VAV-PRC011-EN_07162013

VariTrane™ Products

Single Duct/Dual Duct Units

VDD, VCC, VCW, VCE

July 2013 VAV-PRC011-EN

RAEA

OA PAsupplyfan

coolingcoil

variable-speed drive

thermostat

VAVbox

SA

Variable-Air-Volume (VAV) System

Product Catalog

© 2013Trane All rights reserved VAV-PRC011-EN

Introduction

VariTrane™ variable-air-volume (VAV) units lead the industry in quality and reliability and aredesigned to meet the specific needs of today’s applications.This generation of VariTrane unitsbuilds upon the history of quality and reliability and expands the products into the most completeVAV offering in the industry.

Single-duct units provide an economical energy-savings system solution.This is the mostcommon type of VAV unit.

Dual-duct units have two air valves. One heating valve and one cooling air valve modulatesimultaneously to provide occupant comfort.This option is also used with system concepts whichuse one valve for maintaining and monitoring 100% ventilation air.

Revision Summary

VAV-PRC011-EN (16 Jul 2013). Updated proportional water valve design

VAV-PRC011-EN (27 Jun 2013). Added wireless and UC210 information. Added bottom accesswith cam lock configuration. Updated dimensions for units with attenuators.

Trademarks

Tracer, VariTrane, VariTrac,Trane and theTrane logo are trademarks ofTrane in the United Statesand other countries. All trademarks referenced in this document are the trademarks of theirrespective owners.

BACnet is a registered trademark of American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE); LONMARK and LonTalk are registered trademarks of EchelonCorporation.

VCCF VCWF

VCEF

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Indoor Air Quality (IAQ) Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Tracer™ Building Automation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Trane VAV Systems - Proven Performance . . . . . . . . . . . . . . . . . . . . . . . . . 10

Indoor Air Quality Management During Construction . . . . . . . . . . . . . . . . . 10

Agency Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Single Duct Model Number Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Single-Duct VAV Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Dual Duct Model Number Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Dual-Duct VAV Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

DDC Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Control Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

DDC Remote Heat Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Tracer UC400 and UC210 Programmable BACnet Controllers . . . . . . . . . . 75

Trane LonMark™ DDC VAV Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Direct Digital Controller—Unit Control Module . . . . . . . . . . . . . . . . . . . . . . 92

Wireless Comm Interface (WCI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Wireless Receiver/Wireless Zone Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

DDC Zone Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

CO2 Wall Sensor and Duct CO2 Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

DDC Zone Sensor with LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Zone Occupancy Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

VAV-PRC011-EN 3

Factory or Field Mounted Auxiliary Temperature Sensor . . . . . . . . . . . . . 100

Two-Position Water Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Proportional Water Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Differential Pressure Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Trane Non-Spring Return Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Trane Spring Return Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

VariTrane™ DDC Retrofit Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Retrofit Kit Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Static Pressure Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Electric Heater Silicon-Controlled Rectifier (SCR) . . . . . . . . . . . . . . . . . . . 109

Pneumatic Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

3501 Pneumatic Volume Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Pneumatic Damper Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Reversing Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Signal Limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Controls Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Direct Digital Controls (DDC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Pneumatic Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Hot Water Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

DDC Retrofit Kit (VRTO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Retrofit Kit Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Other Options Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Application Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

VAV System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Control Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Flow Measurement and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Reheat Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Duct Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Best Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Unit Conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Additional VAV System and Product References . . . . . . . . . . . . . . . . . . . . 144

4 VAV-PRC011-EN

Features and Benefits

Construction

UL-listed products—

Safety and reliability are vital in commercial construction. All VariTrane™ units are listed inaccordance with UL -1995 as terminal units.This listing includes the VAV terminal with electricheaters. Additionally, all insulation materials pass UL 25/50 smoke and flame safety standards.

AHRI Certified Performance—

All VariTrane units are AHRI certified. AHRI 880 guarantees the pressure drop, flow performance,and acoustical performance provided is reliable and has been tested in accordance with industryaccepted standards. AHRI 885 uses AHRI 880 performance and applies accepted industry methodsto estimate expected “NC” sound levels within the occupied space.

Casing Design—

Interlocking Panels—VariTrane products are manufactured inTrane’s state-of-the-art facility in theU. S.The interlocking panels are designed using integral I-beam construction technology.Thisminimizes deformation and creates tremendous product rigidity.An additional benefit is a smoothunit exterior with few exposed screws—ideal for exposed ceiling applications.VariTrane units aredesigned for use in systems that operate up to 5" w.c. of inlet pressure.

Metal Encapsulated Edges—AllVariTrane units are completewith encapsulated edges to arrest cut fibers and preventinsulation erosion into the airstream.This is the standard ofcare in applications concerned with fiberglass erosion orprojects with either double-wall or externally wrapped ductwork.

TheTrane Air Valve—is at the heart of VariTrane terminalunits.This is where airflow is measured and controlled.Repeatability and ruggedness is vital.VariTrane products arethe most rugged and reliable available.

18-gage Cylinder—limits deformation or damage during shipment and job site handling, andprovides even airflow distribution across the flow ring for unmatched airflow measurementaccuracy.

ContinuouslyWelded Seam — an automated weld process creates the highest quality continuousseam, which is “right” every time.The welded seam improves air valve rigidity and createsconsistent and repeatable airflow across the flow measurement device.The result is a truly roundcylinder, with no flat spots caused by lower quality crimping and riviting technologies.

Flow Ring—TheTrane flow ring is time tested to perform under themost demanding conditions. Additionally,Trane’s patented flow ringis recessed within the air valve cylinder to reduce the potential fordamage during job site handling and installation.

External Shaft—This simple design provides controller flexibility and is designed to facilitateactuator field replacement.

VAV-PRC011-EN 5


Position Indicator—The position indicator shows current air valve position to aid in systemcommissioning. Many times this can be seen from the floor without climbing a ladder.

ExternalActuator—This feature increases serviceability, control system compatibility, and actuatorclutch access for simplified commissioning.

Indoor Air Quality (IAQ) Features

The oil embargo of the early 1970s created an energy crisis, which resulted in tighter buildings, andreduced ventilation rates. A fallout issue of tighter building construction was poor indoor airquality.This heightened IAQ awareness. IAQ issues have been featured in publications from thesmallest towns to the largest cities. System design should consider applicable ventilation and IAQstandards.(See your localTrane Sales Engineer or visit www.trane.com for additionalinformation). Good indoor air quality results from units and systems which:

• Provide the required amount of ventilation air to each zone during all operating conditions

• Limit particulates from entering occupied spaces

VariTrane units are designed with simplified access and a full line of insulation options including:

Matte-faced—Typical industry standard with reduced first cost.

Closed-cell—This insulation has an R-value and performance equivalent to matte-faced insulation.The main difference is the reduction of water vapor transmission. Closed-cell is designed for usein installations with a high chance of water formation. (It has been used to coat the exterior of chillerevaporator barrels for many years.)

Foil-faced—A fiberglass insulation with a thin aluminum coating on the air stream side to preventfibers from becoming airborne.The aluminum lining is acceptable for many applications, howeverit is not as rugged as double-wall.

Double-wall—Premium insulation often used in many health care applications with insulationlocked between metal liners.This eliminates the possibility for insulation entering the airstreamand allows for unit interior wipe-down as needed.

VariTrane VAV units are the most prepared IAQ units in the industry.The end result is a reliableproduct designed for peak performance, regardless of job site conditions or handling.

Tracer™ Building Automation System

Tracer Building Automation System assures comfort within your building

Building controls have a bigger job description than they did a few years ago. It’s no longer enoughto control heating and cooling systems and equipment. Sophisticated buildings require smartertechnology that will carry into the future. Tracer™ controls provide the technology platform –mobile, easy-to-use, cloud-based, scalable and open - for the next generation of data-driven,technology-enabled services that are creating high performance buildings.

With aTraneTracer Building Automation System, you’ll:

• Reduce operating costs through energy management strategies

• Consistently provide occupant comfort

• Enjoy reliable operation with standard, pre-engineered and pretested applications

• Easily troubleshoot and monitor either on site or from a remote location

• Reduce installation time and simplify troubleshooting

Whether factory-mounted or field-installed,Trane offers a wide range of controllers to suit virtuallyany application.These units are compatible with a variety of building types and can be used for newconstruction or renovation.Through extensive usability testing internally and with buildingoperators, we’ve designed our controls for real world ease of use.

(Additional control options and sequence-of-operations are located in the “Controls” section.)

6 VAV-PRC011-EN


Trane VAV UCM Controller

Note: One of many Trane DDC Control Options which are factory-installed, wired, calibrated, and fully tested before shipment.

Trane DDC controllers provideTrane-designed solid-state electronics intended specifically forVAVtemperature control in space comfort applications. DDC control capabilities include:

• Pressure-independent (PI) operation—Provides airflow required by the room thermostat tomaintain occupant comfort.The controller automatically adjusts valve position to maintainrequired airflow. Minimum and maximum airflow is factory-set and field-adjustable.

• Factory-set airflow and temperature setpoints

Tracer VV550 LonTalk™ Controllers

Tracer BACnet™ Controllers

Trane now offers a full line of BACnet controllers designed for simple integration into any systemwhich can communicate via the BACnet protocol.These controllers are factory-commissioned andshipped ready to be installed.

Trane VAV UCM DDC Controller

DDC (communicating electronic)—DDCcontrollers provide system-level data used tooptimize overall SYSTEM performance.Variables such as occupied/unoccupied,minimum and maximum cfm andtemperature, valve position, ventilationfraction, etc. are available on a simple twisted-shielded wire pair. For additional information,see “Industry Issues: Energy Efficiency”.

LonTalk controller

Trane offers a full line of LonTalk™ controllers designed forsimple integration into ANY system which can communicatevia the LonMark Space Comfort Control (SCC) protocol.These controllers are also completely factory-commissioned(see Table , p. 9).

UC210 BACnet Controller UC400 BACnet Controller

VAV-PRC011-EN 7


Trane Wireless Comm Interface (WCI)

Trane Wireless Zone Sensor

Pneumatic Controller

WCI controller

Provides wireless communication between theTracer SC,Tracer Unit Controllers, and BACnet Communication Interface(BCI) modules.

TheTrane WCI is the perfect alternative toTrane’s BACnetwired communication links (for example – Comm linksbetween aTracer SC andTracer UC400).

Eliminating communication wire used between terminalproducts, zone sensors, and system controllers has substantialbenefits.

• Installation time and associated risks are reduced.

• Projects are completed with fewer disruptions.

• Future re-configurations, expansions, and upgrades areeasier and more cost effective.

Wireless Zone Sensor

Provides wireless communication between the Unit Controllerand the zone sensor.This is an alterntive to the wired zonesensor when access and routing of communicaiton cable is anissue. It also allows very flexible mounting and relocation ofzone sensors.

Pneumatic Controller

Pneumatic—Pneumatic controllers provide proven reliabilityand performance. A full line of options provide:

• Highest quality PVR available, which maximizes zonetemperature control.

Pressure-independent operation

• AllVariTrane™ pneumatic controllers use the patented flowsensor input to provide the most accurate performanceavailable.

8 VAV-PRC011-EN


Binary Input Controller

Integration Options (Interfacing with other control systems) -Trane offers three ways tointerface with other control systems.

1. UseTrane LonMark, factory-commissioned VAV controllers

2. UseTrane BACnet factory-commissioned VAV controllers.

Factory-installed vs. Factory-commissioned:

The terms factory-installed and factory-commissioned are often used interchangeably.Trane takesgreat pride in being the industry leader in factory-commissioned DDC controllers. Table , p. 9differentiates these concepts.

Factory-commissioned controllers provide the highest quality and most reliable units for yourVAVsystem. Additional testing verifies proper unit operation including occupied/unoccupied airflow,temperature setpoints, communication link functionality, and output device functionality.Thebenefits of factory-commissioning are standard on VariTrane terminal units withTrane DDCcontrols.This means that factory-commissioned quality on VariTrane VAV units is now availableon ANY manufacturer’s control system that can communicate using the LonMark Space ComfortControl (SCC) protocol. (See Controls section for complete listing of variables which arecommunicated.)

Binary Input Controller

Binary Input Controllers are system level controllers design tocommunicate with the VAV boxes via external binary inputs.This non-programmable controller satisfies criticalrequirements for systems that do not need the full functionalityof a true Building Automation System (BAS).

Table 1. Factory-installed vs. factory-commissioned

Factory-installedFactory-

commissioned

Transformer installed (option) X X

Wires terminated in reliable/consistent setting X X

Controller mounted X X

Electric heat contactors and fan relay wired X X

Testing of electric heat contactors and fan relay X

Controller addressing and associated testing X

Minimum & Maximum airflows settings (occupied/unoccupied) X

Minimum & Maximum temperature setpoints (occupied/unoccupied) X

Minimum ventilation requirements X

Thumbwheel enable/disable X

Heating offset X

Wireless communications modules (WCI) X X

Wireless zone sensor X

Pre-wired duct temperature sensor X X

Pre-wired water valve harness X X

Wireless zone sensor receiver X

VAV-PRC011-EN 9


Trane VAV Systems - Proven Performance

Trane is the industry leader in VAV systems, including factory-commissioned controls andintegration with other control systems.This leadership began with customers seeking the mostreliable VAV products in the industry.The solution was factory-commissioned controls (seeFactory-installed vs. Factory-commissioned). Since then, it has blossomed to include optimizedsystem control strategies.

Control strategies are often made more complicated than necessary. VariTrane™ DDC controlssimplify control strategies by pre-engineering control logic and sequencing into controller.Thisinformation is available via a twisted-shielded wire pair or wireless communication, and accessiblevia aTraneTracer™ SC. Data is easily accessed via a computer workstation.

Optimized system control strategies, such as ventilation optimization, fan-pressure optimization,and optimal start/stop, are pre-engineered in VariTrane unit-level DDC controllers and theTracerSC building automation system.

This allows aTrane VAV system to meet or exceed the latest ASHRAE 90.1 Energy Efficiencystandards. Pre-engineered controls allow consistent, high quality installations which are veryrepeatable.The end result is PROVEN control strategies you can rely on to perform. For moreinformation on these and other control strategies, contact your localTrane Sales Office, or visitwww.trane.com.

• Purchasing VAV controllers and VAV hardware from a single manufacturer provides a singlecontact for all HVAC system related questions

Indoor Air Quality Management During Construction

LEED wrap option is a pressure sensitivecovering that prevents contamination of theVAV box during the construction phase. It isutilized to seal all openings withoutconstraining the installation process.

10 VAV-PRC011-EN

Agency Certifications

There are numerous regulations and standards in the industry that determine the construction andperformance parameters for VAV terminal units. Some of the more important of those standardsand regulations are listed below, along with a brief description of what each one addresses.

American Society of Heating, Refrigerating and Air-conditioning Engineers

(ASHRAE) - 41.1

ASHRAE - 41.2

ASHRAE - 41.3

These standards specify methods for temperature measurement (41.1), laboratory airflowmeasurement (41.2), and pressure measurement (41.3).While none of these standards specificallydiscusses VAV air terminals, they discuss topics that are aspects of terminal box systems.Therefore, some engineers will include these standards in their specifications as a primer onaccepted measurement techniques.

ASHRAE - 62

This standard specifies the minimum ventilation rates and indoor air quality that are acceptable foroccupied spaces.

ASHRAE - 111

This standard calls out procedures to be followed for testing and balancing HVAC systems. Itincludes descriptions of the equipment used, procedures followed, and field changes that must bemade when a system is balanced.

Air Conditioning and Refrigeration Institute (AHRI)

AHRI 880 - 2011

This standard sets forth classifications, performance testing requirements, and test resultsreporting requirements for air terminal units.The standard contains very detailed procedures thatare to be followed for the testing and certification program associated with this standard.This isone of the most commonly referenced standards in the VAV terminal unit industry.The AHRI-880certification program is designed to police the accuracy of documented performance for terminalunits.The certification program requires a sampling of at least four units be tested annually.Thetested units are chosen at random by AHRI and sent to an independent laboratory for the testing.The performance is tested at one specific operating condition.The operating characteristics testedinclude discharge and radiated sound power (for the damper and, in the case of fan-poweredboxes, the fan), wide-open damper pressure drop, and fan motor amp draw.VariTrane terminalunits are certified according to AHRI-880.

AHRI 885-2008

This document provides a procedure to estimate sound pressure levels in an occupied space.Thestandard accounts for the amount of sound pressure in the space due to the VAV air terminal,diffusers and their connecting low pressure ductwork. While sound generated from the centralsystem fan and ductwork may be a significant factor in determining the sound pressure level in theroom, this standard does not address those factors. It focuses solely on theVAV terminal and itemsdownstream of it.This standard is related to AHRI-880 by using sound power determined usingAHRI-880 methodology as a starting point for the AHRI-885 procedure.

Underwriter’s Laboratory (UL) 1995

Underwriter’s Laboratory is an independent testing agency that examines products anddetermines if those products meet safety requirements. Equipment manufacturers strive to meetUL guidelines and obtain listing and classifications for their products because customers recognizeUL approval as a measure of a safely designed product. VariTrane VAV air terminals are listedper UL-1995, Heating and Cooling Equipment.The terminals are listed as an entire assembly.

VAV-PRC011-EN 11

Agency Certifications

National Fire Protection Association

NFPA 70

This standard is also known as the National Electrical Code (NEC).The Code gives standards forinstallation of wiring and electrical equipment for most types of commercial and residentialbuildings. It is often referred to inVAV air terminal specifications when fan-powered boxes, electricheat or electric controls are included.

NFPA 90A

This standard does not speak directly to VAV air terminals but does discuss central systemconsiderations pertaining to a fire and/or smoke condition.The standard discusses safetyrequirements in design and construction that should be followed to keep the air-handling systemfrom spreading a fire or smoke.The standard specifies practices that are intended to stop fire andsmoke from spreading through a duct system, keep the fire-resistive properties of certain buildingstructures (fire walls, etc.) intact, and minimize fire ignition sources and combustible materials.

12 VAV-PRC011-EN

Single Duct Model Number Descriptions

Digit 1, 2 — UnitTypeVC = VariTrane Single Duct

Digit 3—ReheatC = Cooling OnlyE = Electric HeatW = Hot Water Heat

Digit 4—Development SequenceF = Sixth

Digit 5, 6—Primary Air Valve04 = 4" inlet (225 cfm)05 = 5" inlet (350 cfm)06 = 6" inlet (500 cfm)08 = 8" inlet (900 cfm)10 = 10" inlet (1400 cfm)12 = 12" inlet (2000 cfm)14 = 14" inlet (3000 cfm)16 = 16" inlet (4000 cfm)24 = 24" x 16" inlet (8000 cfm)

Digit 7, 8, 9—Not Used000= N/A

Digit 10, 11—Design Sequence** = Factory Assigned

Digit 12, 13, 14, 15—ControlsDD00 Trane Actuator Only and

EnclosureDD01= UCM4 Cooling Only ControlDD02= UCM4 N.C. On/Off Hot WaterDD03= UCM4 Prop. Hot WaterDD04= UCM4 Staged On/Off E-HeatDD05= UCM4 Pulse Width MOD E-HeatDD07= UCM4 N.O. On/Off Hot WaterDD11= VV550 DDC Controller - Cooling

OnlyDD12= VV550 DDC Ctrl to operate N.C.

On/Off water valveDD13= VV550 DDC Ctrl to operate Prop

water valveDD14= VV550 DDC Ctrl - On/Off Electric

HeatDD15= VV550 DDC Ctrl w/Pulse Width

ModulationDD16= VV550 DDC Controller -

Ventilation FlowDD17= VV550 DDC Ctrl to operate N.O.

On/Off Water ValveDD19= VV550 DDC Controller with Flow

TrackingDD20= VV550 DDC Vent Flow cntrl to

operate N.C. water valveDD21= VV550 DDC - Vent Flow w/ On/Off

Elec HeatDD22= VV550 DDC Vent Flow cntrl to

operate prop water valveDD23= VV550 DDC- Basic plus- Local

(Electric heat- PWM) Remote(Staged EH)

DD24= VV550 DDC-Basic plus- Local(Water heat- Modulating)Remote (Water- N.C. 2 position)

DD25= VV550 DDC-Basic plus- Local(Water heat- Modulating)Remote (Water- N.O. 2 position)

VAV-PRC011-EN

DD26= VV550 DDC-Basic plus- Local(Water heat- N.O. 2-position)Remote (Water- Modulating)

DD27= VV550 DDC-Basic plus- Local(Water heat- N.C. 2-position)Remote (Water- Modulating)

DD28= VV550 DDC-Basic plus- Local(Water heat- N.O. 2-position)Remote (Water- N.O. 2-position)

DD29= VV550 DDC-Basic plus- Local(Water heat- N.C. 2-position)Remote (Water- NC 2-position)

DD30= VV550 DDC-Basic plus- Local(Water heat- N.O. 2-position)Remote (Water- N.C. 2-position)

DD31= VV550 DDC-Basic plus- Local(Water heat- N.C. 2-position)Remote (Water- N.O. 2-position)

DD32= VV550 DDC-Basic plus- Local(Electric heat- Staged) Remote(Staged EH)

DD33= VV550 DDC Vent Flow cntrl tooperate N.O. On/Off water valve

DD41= UC400 DDC-Basic (No water orelectric heat)

DD42= UC400 DDC-Basic (Water heat-N.C.- 2 position)

DD43= UC400 DDC-Basic (Water heat-Modulating)

DD44= UC400 DDC-Basic (Electric heat-staged)

DD45= UC400 DDC-Basic (Electric heat-PWM)

DD46= UC400 DDC Ventilation flow-cooling only

DD47= UC400 DDC-Basic (Water heat-N.O.- 2 position)

DD49= UC400 DDC-FlowTracking(Cooling only)

DD50= UC400 DDC-Ventilation Flow(Water heat- N. C.- 2 position)

DD51= UC400 DDC-Ventilation Flow(Electric heat- staged)

DD52= UC400 DDC-Ventilation Flow(Water heat- Modulating)

DD53= UC400 DDC-Basic plus- Local(Electric heat- PWM) Remote(Staged EH)

DD54= UC400 DDC-Basic plus- Local(Water heat- Modulating)Remote (Water- N.C. 2 position)

DD55= UC400 DDC-Basic plus- Local(Water heat- Modulating)Remote (Water- N.O. 2 position)

DD56= UC400 DDC-Basic plus- Local(Water heat- N.O. 2-position)Remote (Water- Modulating)

DD57= UC400 DDC-Basic plus- Local(Water heat- N.C. 2-position)Remote (Water- Modulating)

DD58= UC400 DDC-Basic plus- Local(Water heat- N.O. 2-position)Remote (Water- N.O. 2-position)

DD59= UC400 DDC-Basic plus- Local(Water heat- N.C. 2-position)Remote (Water- N.C. 2-position)

DD60= UC400 DDC-Basic plus- Local(Water heat- N.O. 2-position)Remote (Water- N.C. 2-position)

DD61= UC400 DDC-Basic plus- Local(Water heat- N.C. 2-position)Remote (Water- N.O. 2-position)

DD62= UC400 DDC-Basic plus- Local(Electric heat- Staged) Remote(Staged EH)

DD63= UC400 DDC-Ventilation Flow(Water heat- N.O. 2-position)

DD65= UC400 Basic(Electric HeatModulating SCR)

DD66= UC400 Basic plus-Local(Electric heat-Modulating SCR)Remote (Staged EH)

DD67= UC400 Ventilation Flow(Electric heat-Modulating SCR)

DD71= UC210 DDC-Basic (No water orelectric heat)

DD72= UC210 DDC-Basic (Water heat-N.C.- 2 position)

DD73= UC400 DDC-Basic (Water heat-Modulating)

DD74= UC210 DDC-Basic (Electric heat-staged)

DD75= UC210 DDC-Basic (Electric heat-PWM)

DD76= UC210 DDC Ventilation flow-cooling only

DD77= UC210 DDC-Basic (Water heat-N.O.- 2 position)

DD79= UC210 DDC-FlowTracking(Cooling only)

DD80= UC210 DDC-Ventilation Flow(Water heat- N. C.- 2 position)

DD81= UC210 DDC-Ventilation Flow(Electric heat- staged)

DD82= UC210 DDC-Ventilation Flow(Water heat- Modulating)

DD83= UC210 DDC-Basic plus- Local(Electric heat- PWM) Remote(Staged EH)

DD84= UC210 DDC-Basic plus- Local(Water heat- Modulating)Remote (Water- N.C. 2 position)

DD85= UC210 DDC-Basic plus- Local(Water heat- Modulating)Remote (Water- N.O. 2 position)

DD86= UC210 DDC-Basic plus- Local(Water heat- N.O. 2-position)Remote (Water- Modulating)

DD87= UC210 DDC-Basic plus- Local(Water heat- N.C. 2-position)Remote (Water- Modulating)

DD88= UC210 DDC-Basic plus- Local(Water heat- N.O. 2-position)Remote (Water- N.O. 2-position)

DD89= UC210 DDC-Basic plus- Local(Water heat- N.C. 2-position)Remote (Water- N.C. 2-position)

DD90= UC210 DDC-Basic plus- Local(Water heat- N.O. 2-position)Remote (Water- N.C. 2-position)

DD91= UC210 DDC-Basic plus- Local(Water heat- N.C. 2-position)Remote (Water- N.O. 2-position)

13

Single Duct Model Number Descriptions

DD92= UC210 DDC-Basic plus- Local(Electric heat- Staged) Remote(Staged EH)

DD93= UC210 Ventilation Flow(Water heat- N.O. 2-position)

DD95= UC210 Basic(Electric HeatModulating SCR)

DD96= UC210 Basic plus-Local(Electric heat-Modulating SCR)Remote (Staged EH)

DD97= UC210 Ventilation Flow(Electric heat-Modulating SCR)

ENCL= Shaft Only in EnclosureENON= Shaft Out Side for Electric UnitsFM00= Other Actuator and ControlFM01= Trane Supplied Actuator, Other

CtrlPC00= N.C. Actuator and Linkage OnlyPC04= N.C. with DA Stat, 3000 SeriesPC05= N.C. with RA STAT, 3000 SeriesPCSS= Normally Closed SpecialPN00= N.O. Actuator and Linkage OnlyPN04= N.O. 3000 Series, DA STATPN05= N.O. 3000 Series, RA STATPN11= Auto Dual Min.PN32= N.O. PNEU Constant Vol.PN34= N.O. 3000 Series Constant

Vol.,RA STATPNON= Shaft Out Side for Pneumatic

UnitsPNSS= Normally Open SpecialN.C .= Normally-closedN.O. = Normally-openedDA Stat = Direct-acting pneumatic t-stat

(by others)RA Stat = Reverse-acting pneumatic

t-stat (by others)PN = PneumaticFM = Factory installation of customer-

supplied controllerPVR = Pneumatic Volume Regulator

Digit 16—InsulationA = 1/2" Matte-facedB = 1" Matte-facedD = 1" Foil-facedF = 1" Double-wallG = 3/8" Closed-cell

Digit 17 & 18—Not Used00 = N/A

Digit 19—Outlet Plenum(Connection is Slip & Drive)

0 = NoneA = 1 Outlet RHB = 1 Outlet ENDC = 1 Outlet LHD = 2 Outlets, 1 RH, 1 ENDE = 2 Outlets, 1 LH, 1 ENDF = 2 Outlets, 1 RH, 1 LHH = 3 Outlets, 1 LH, 1 RH, 1 ENDJ = 4 Outlets, 1 LH, 1 RH, 2 END

Note: See unit drawings for outlet sizes/damper information.

Digit 20—Not Used0 = N/A

14

Digit 21—Water Coil0 = None1 = 1-Row2 = 2-Row3 = 3-Row4 = 4-RowA = 1-Row PremiumB = 2-Row PremiumC = 3-Row PremiumD = 4-Row Premium

Digit 22—Electrical ConnectionsL = Left (Airflow hitting you in the

face)R = Right (Airflow hitting you in the

face)0 = Opposite side connection – coil

and control

Note: VCCF,VCWF can be flipped in fieldfor opposite-hand connection

Digit 23—Transformer0 = None1 = 120/24 volt (50 VA)2 = 208/24 volt (50 VA)3 = 240/24 volt (50 VA)4 = 277/24 volt (50 VA)5 = 480/24 volt (50 VA)6 = 347/24 Volt (50 VA)7 = 380/24 Volt (50 VA)8 = 575/24 Volt (50 VA)

Note: For VCEF units with transformersthe VA depends on the staging,control, and contactor type(ranges are 50 VA to 75 VA, for 1and 3 phase)

Digit 24—Disconnect Switch0 = NoneW = With

Note: VCCF, VCWF –Toggle Disconnect;VCEF – Door Interlocking PowerDisconnect

Digit 25—Power Fuse0 = NoneW = With

Digit 26—Electric Heat Voltage0 = NoneA = 208/60/1B = 208/60/3C = 240/60/1D = 277/60/1E = 480/60/1F = 480/60/3G = 347/60/1H = 575/60/3J = 380/50/3K = 120/60/1

Digit 27 - 29—Electric Heat kW000= None010 = 1.0 kW015 = 1.5 kW460 = 46.0 kW

Note: 0.5 to 8.0 kW – ½ kW increments8.0 to 18.0 kW – 1 kW increments18.0 to 46.0 kW – 2 kW increments

Digit 30—Electric Heat Stages0 = None1 = 1 Stage2 = 2 Stages Equal3 = 3 Stages Equal

Digit 31—Electrical HeatContactors

0 = None1 = 24-volt magnetic2 = 24-volt mercury3 = PE with magnetic4 = PE with mercury5 = SCR heat UC4006 = SCR heat FMTD/ENCL/DD00

Digit 32 & 33—Not Used00 = N/A

Digit 34—Actuator0 = StandardA = Spring Return (Normally Open)B = Spring Return (Normally Closed)C = Belimo Actuator

Digit 35—Sensor Options0 = Standard (Wired)1 = Factory Mounted Wireless

Receiver (Sensor Accessory)2 = Wireless Comm Interface

Modular FM

Digit 36—Pre-Wired FactorySolutions0 = None1 = Factory Mounted DTS2 = HW Valve Harness3 = Both DTS & HW Valve Harness

Digit 37—Bottom Access withCam Locks0 = None1 = Access Left SideTerminal Unit2 = Access Right SideTerminal Unit3 = Access Left SideTerminal Unit

with Water Connection on Right4 = Access Right SideTerminal Unit

with Water Coil Connection onLeft

VAV-PRC011-EN

Single-Duct VAVTerminal Units

The features of the single-ductVAV terminal units are described by the product categories shownin bold. Within each category the available options are listed.

Selection Procedure

This section describes the catalog selection of single-duct VAV terminal units with specificexamples. A computer selection program is also available to aid in selection ofVAV terminal units.Selection of single-duct VAV terminal units can involve three elements:

• Air valve selection

• Heating coil selection (if required)

• Acoustics controls

Air Valve Selection

The wide-open static pressure and airflows are found in the performance data section of thecatalog.To select an air valve, locate the required design cooling airflow for your terminal unit typeand find the smallest air valve size that has a pressure drop equal to or lower than the maximumwide-open static pressure requirement.

Selection Example: Cooling Only VCCFTerminal Unit

Design cooling airflow: 1700 cfm

Maximum wide open Air pressure drop: 0.25 in. wg

Minimum cooling airflow: 850 cfm

From the performance data charts, select a valve size 12, which has a wide-open static pressuredrop of 0.01 in. wg

Check the minimum and maximum cfm desired with the minimum and maximum cfm allowed inthe table in the general data section.The maximum setting of 1700 cfm is within the acceptablerange.The desired minimum setting of 850 cfm is acceptable for the cooling only box desired. Notethat if an electric reheat box was selected, the minimum cfm would be dependent upon the kW ofthe electric heater. (See Electric Heat Unit Selection.)

Heating Coil Selection (If required)

First, determine the amount of heat required to meet space and downstream duct heat losses froma load calculation.

Hot Water Heat

Select a hot water coil sufficient to meet the design heat loss.

Example:

VCWF, Hot Water Unit Heat, Size 12 (See air Valve Selection)

Heating airflow: 850 cfm

Hot water flow: 1.0 gpm

Design Heat Loss: Q =25 MBh

Select hot water coil from the coil performance table in the Performance Data section of the catalog.

Selection:

A one-row coil is sufficient to meet design conditions. From the HotWater Coil Capacity Data of thePerformance Data Section, a one-row coil for a size 12 air valve will operate at the above conditionsas follows:

Coil Capacity: 25.17 MBh

Water pressure drop: 0.72 ft WPD

VAV-PRC011-EN 15


Air pressure drop (APD) of the hot water coil is included in the chart preceding the hot water coilperformance data section.

APD = 0.35 in. wg

Electric Heat

Determine the kW required to meet zone design heat loss.

kW=MBh / 3.414

MBh=Design Heat Loss

Select the nearest available kW with voltage and steps desired from the electric heater kW guidelinetable in the Performance Data section of the catalog.

Example:

VCEF, Electric Unit Heat, Size 12 (See Air Valve Selection)

Heating airflow: 850 cfm

Voltage: 277/60/1 VAC

Design Heat Loss: Q=25 MBh

kW=Q/3.414kW=25/3.414kW=7.3

Selection:

Select 7.5 kW from the electric heat table in the voltage and stages required.The table shows theminimum cfm allowable for the kW selected.The static pressure requirement is shown as 0.06 in.wg for this example with a design cooling flow of 1700 cfm.

Check Leaving AirTemperature:

T is the primary entering air temperature 55°F for this example.

Decide if leaving air temperature of 82.8°F is satisfactory for your application.

Acoustics

The acoustical data found in the "Performance Data" section of the VAV catalog is used to make adetermination of the amount of noise the terminal unit will generate. Locate the table for the VAVterminal unit of interest. Sound power data and an equivalent NC level for an AHRI 885-2008transfer function is listed.

Example:

VCCF, Cooling-OnlyTerminal Unit, Size 10 (See air Valve Selection)

Cooling Airflow: 1100 cfm

Maximum inlet static pressure: 1.5 in. wg

Interpolation gives sound power data of:

The NC level above is determined by using either the catalog’s AHRI 885-2008 mineral fiber forradiated sound transfer function for the conditions shown in the acoustics table. A differenttransfer function could be applied as conditions dictate.

LAT Q1.085 CFM------------------------------------- T+=

LAT 3414 7.51.085 850----------------------------------- 55 82.8=+=

Octave Band 2 3 4 5 6 7 NC

Disch Sound Power 68 68 65 65 60 57 28

Rad Sound Power 63 58 54 47 39 32 29

16 VAV-PRC011-EN


The maximum NC level is NC-29. If the maximum NC level was exceeded, it would have beennecessary to reselect the next larger unit size.

Computer Selection

The advent of personal computers has served to automate many processes that were previouslyrepetitive and time-consuming. One of those tasks is the proper scheduling, sizing, and selectionof VAV terminal units.Trane has developed a computer program to perform these tasks.Thesoftware is called theTrane Official Product Selection System (TOPSS).

TheTOPSS program will take the input specifications and output the properly sizedVariTraneVAVterminal unit along with the specific performance for that size unit.

The program has several required fields, denoted by red shading in theTOPSS screen, and manyother optional fields to meet the criteria you have. Required values include maximum andminimum airflows, control type, and model. If selecting models with reheat, you will be requiredto enter information to make that selection also.The user is given the option to look at all theinformation for one selection on one screen or as a schedule with the other VAV units on the job.

The user can select single-duct, dual-duct, and fan-powered VAV boxes with the program, as wellas most otherTrane products, allowing you to select all yourTrane equipment with one softwareprogram.

The program will also calculate sound power data for the selected terminal unit.The user can entera maximum individual sound level for each octave band or a maximum NC value.The program willcalculate acoustical data subject to default or user supplied sound attenuation data.

Schedule View

The program has many time-saving features such as: 1) Copy/Paste from spreadsheets likeMicrosoft® Excel; 2) Easily arranged fields to match your schedule; and 3)Time-saving templatesto store default settings.

The user can also export the Schedule View to Excel to modify and put into a CAD drawing as aschedule. Specific details regarding the program, its operation, and how to obtain a copy of it areavailable from your localTrane sales office.

General Data

Table 2. Primary airflow control factory settings - I-P

Control Type Air Valve Size

(in.)Maximum Valve

CfmMaximum Controller

CfmMinimum Controller

Cfm Constant Volume Cfm

Direct Digital Control/ UCM

456

225350500

25-22540-35060-500

0,25-2250,40-3500,60-500

25-22540-35060-500

81012

90014002000

105-900165-1400240-2000

0,105-9000,165-14000,240-2000

105-900165-1400240-2000

1416

24 x 16

300040008000

320-3000420-4000800-8000

0,320-30000,420-40000,800-8000

320-3000420-4000800-8000

Pneumatic with Volume Regulator

456

225350500

38-22563-35073-500

0,38-2250,63-3500,73-500

38-22563-35073-500

81012

90014002000

134-900215-1400300-2000

0,134-9000,215-14000,300-2000

134-900215-1400300-2000

1416

24 x 16

288737897745

408-2887536-37891096-7745

0,408-28870,536-37890,1096-7745

408-2887536-37891096-7745

VAV-PRC011-EN 17


Table 3. Primary airflow control factory settings - SI

Control TypeAir Valve Size (in.) Maximum Valve L/s

Maximum Controller L/s

Minimum Controller L/s

Constant Volume L/s


456

106165236

12-10619-16528-236

0,12-1060,19-1650,28-236

12-10619-16528-236

81012

425661944

50-42577-661111-944

0,50-4250,77-6610,111-944

50-42577-661111-944

1416

24 x 16

141618883776

151-1416198-1888378-3776

0,151-14160,198-18880,378-3776

151-1416198-1888378-3776


456

106165236

18-10630-16535-236

0,18-1060,30-1650,35-236

18-10630-16535-236

81012

425661944

63-425102-661141-944

0,63-4250,102-6610,141-944

63-425102-661141-944

1416

24 x 16

136317883656

193-1363253-1788517-3656

0,193-13630,253-17880,517-3656

193-1363253-1788517-3656

Note: Maximum airflow must be greater than or equal to minimum airflow.

18 VAV-PRC011-EN


Performance Data

Table 4. Air pressure drop - in. wg (I-P)

Inlet Size Airflow Cfm Cooling OnlyHot Water 1-row coil

Hot Water 2-row coil

Hot Water 3-row coil

Hot Water 4-row coil Electric Heat

04

50100150225

0.010.010.010.01

0.010.020.030.06

0.010.020.030.06

0.010.030.080.16

0.010.040.100.22

0.010.010.010.02

05

100200300350

0.010.010.010.02

0.010.050.090.12

0.030.080.170.22

0.030.130.270.35

0.040.180.360.47

0.010.010.020.02

06

100250350500

0.010.050.100.22

0.020.110.220.45

0.030.170.320.63

0.030.200.350.64

0.040.260.470.85

0.010.050.110.23

08

200400600900

0.010.020.040.08

0.030.100.200.40

0.050.170.340.69

0.070.240.490.97

0.090.320.641.28

0.010.020.050.11

10

50080011001400

0.010.010.010.01

0.070.150.270.42

0.120.260.440.66

0.170.380.660.99

0.220.510.881.32

0.010.020.030.05

12

800120016002000

0.010.010.010.01

0.100.190.310.45

0.190.350.550.79

0.220.420.691.01

0.280.560.911.34

0.010.030.050.08

14

1500200025003000

0.010.010.010.01

0.100.160.220.30

0.230.360.510.69

0.340.540.791.09

0.440.721.051.45

0.010.010.010.01

16

2000250030004000

0.010.010.010.01

0.110.160.220.35

0.300.460.651.14

0.390.570.781.29

0.520.761.041.72

0.010.020.020.03

24 x 16

4000550065008000

0.080.160.230.36

0.400.700.95

*

0.66***

0.971.732.383.62

1.292.303.174.83

0.150.300.440.69

Notes: 1. Hot water coil pressure drops are for the entire unit, not just the coil. To calculate the hot water coil only pressure drop, subtract the cooling only

pressure drop from the other pressure drop. 2. * indicated "not recommended"

VAV-PRC011-EN 19


Table 5. Air pressure drop - Pa (SI)

Inlet Size Airflow (L/s) Cooling OnlyHot Water1-row coil

Hot Water2-row coil

Hot Water3-row coil

Hot Water4-row coil Electric Heat

04

255070105

3333

34715

34715

2.57.52040

2.5102555

3333

05

4595140165

3334

3122229

6214154

7.5326787

104590117

3356

06

45120165235

3132655

42955112

74379155

7.55087159

1065117212

3142757

08

95190280420

34921

8254999

134383169

1760122242

2280159319

361228

10

235375520660

3333

163767104

2963110165

4295164247

55127219329

35913

12

375565755940

3333

244776111

4788138195

55105172252

70139227334

371319

14

70094511801415

3333

26405674

5589127171

85135197272

110179262361

3333

16

940118014151885

3333

28405487

73114162284

97142194321

130189259428

3458

24 x 16

1885260030703775

20405790

100176236341

165279366513

242431593902

3215737901203

3876110172

Notes:

1. Hot water pressure drops are for the entire unit, not just the coil. To calculate the hot water coil only pressure drop, subtract the cooling only pressure drop from the other pressure drop.

(TOP VIEW)ARRANGEMENTS A B C D

OUTLET PLENUMHFE J

A,B,C IIII, II III, IV IVI, II I, II

OUTLHJ

D,E,F

N/A

I, II

I, II

N/A

I, II

I, II

N/A

I, II

I, II

I, II, III

N/AI, II, III

II, III, IV

I

II, III, IVIII, IV

I, II

III, IV

OUTLET AVAILABILITY CHART - SEE OUTL CONVERSION FOR NOMINALØ

VALV 4

OUTL CONVERSION CHART

NOMINALØ

5" (127 mm)6" (152 mm)

8" (203 mm)10" (254 mm)IV

5 6SYMBOL

II

III

I8 10 12

20 VAV-PRC011-EN


Table 6. Integral outlet plenum air pressure drop - in. wg (I-P)

Inlet Size

Outlet Configuration

Outlet (in.) Diameter

Airflow (Cfm)

50 100 150 200 250 350 400 500 600 800 900 1100 1200 1400 1600 2000

4,5,64,5,6

A,C56

0.020.01

0.070.03

0.150.07

0.260.13

0.410.20

0.800.37

1.040.48

1.630.74

8,101012

AC81010

0.040.01

0.060.020.03

0.110.040.06

0.140.050.08

0.230.080.12

0.330.120.17

0.580.210.29

0.740.270.37

1.110.410.54

1.330.480.64

1.810.660.86 1.11 1.71

4,5,64,5,6

8B

568

0.010.01

0.030.01

0.080.01

0.150.030.01

0.230.040.01

0.480.070.02

0.640.100.02

1.020.150.03 0.05 0.07 0.09

101012

B81010

0.020.01

0.040.010.02

0.070.010.04

0.090.010.05

0.140.020.08

0.200.020.11

0.350.040.19

0.440.060.24

0.650.080.36

0.760.100.43

1.030.130.58 0.76 1.17

4,5,64,5,6

D,E56

0.010.01

0.010.01

0.020.01

0.040.01

0.050.01

0.090.01

0.120.02

0.170.03

888

D, E568

0.060.020.01

0.090.030.01

0.180.050.01

0.230.070.01

0.350.110.01

0.490.150.01

0.850.260.01

1.060.320.01

101010

D, E6810

0.020.010.01

0.040.010.01

0.070.010.01

0.100.020.01

0.150.020.01

0.220.040.01

0.380.060.02

0.480.080.02

0.720.120.03

0.850.140.04

1.160.190.05

1212

D, E810

0.01 0.020.01

0.030.01

0.050.02

0.070.02

0.120.04

0.150.05

0.230.07

0.280.08

0.380.11

0.490.14

0.770.21

4,5,64,5,6,8

F65

0.010.01

0.010.03

0.030.06

0.050.10

0.080.16

0.160.30

0.210.38

0.320.58 0.83 1.43 1.78

8,108,10

F68

0.050.01

0.080.02

0.140.04

0.180.06

0.270.09

0.370.13

0.610.23

0.760.29

1.080.43

1.260.52

1.660.71

101212

F10810

0.01 0.010.020.01

0.020.040.02

0.020.050.02

0.030.070.03

0.040.100.04

0.070.170.06

0.080.210.08

0.120.310.11

0.140.370.13

0.180.500.16

0.640.21

0.980.30

4,5,6456

H

5666

0.010.010.01

0.010.010.010.01

0.010.010.010.01

0.010.010.010.01

0.01

0.010.01

0.03

0.010.01

0.04

0.01

0.06

0.01

888

H568

0.030.010.01

0.050.010.01

0.090.020.01

0.110.030.01

0.180.040.01

0.250.060.01

0.430.100.02

0.540.130.03

101010

H6810

0.010.010.01

0.020.010.01

0.040.010.01

0.050.010.01

0.080.010.01

0.110.020.01

0.180.030.01

0.220.030.01

0.320.050.01

0.380.050.01

0.500.070.01

1212

H810

0.010.01

0.010.01

0.020.01

0.030.01

0.040.01

0.060.02

0.080.02

0.110.03

0.130.03

0.170.05

0.210.06

0.320.09

101212

J556

0.02 0.020.030.01

0.050.060.02

0.060.080.03

0.090.120.04

0.130.170.06

0.230.300.11

0.290.380.14

0.430.570.21

0.510.680.25

0.700.920.35

1.200.45

1.870.71

VAV-PRC011-EN 21


Table 7. Integral outlet plenum air pressure drop - Pa (SI)

Inlet SizeOutlet

ConfigurationOutlet (mm)

Diameter

Airflow (L/s)

25 50 70 95 120 165 190 235 280 375 420 520 565 660 755 940

4,5,64,5,6

A,C127152

43

178

3718

6632

10249

19993

260120

405185

8,101012

AC203254254

9 143

2758

361015

561319

812129

1453042

1855373

2776791

330101134

451120159

164214 277 427

4,5,64,5,6

8B

127152203

33

83

204

3663

58103

119195

158246

254378 11 19 23

101012

B203254254

63

935

17310

22312

35419

49628

861148

1091461

1612090

19024107

25733145 188 292

4,5,64,5,6

D,E127152

33

33

63

93

133

233

294

426

888

D, E127152203

1553

2373

44133

57173

87263

123373

211643

264813

101010

D, E152203254

633

933

1833

2443

3763

5493

95164

120205

179308

213359

2894812

1212

D, E203254

33

63

73

124

176

3010

3812

5717

6920

9427

12334

19352

4,5,64,5,6,8

F152127

33

47

815

1425

2139

4074

5295

81145 206 355 444

8,108,10

F152203

133

195

3510

4514

6622

9231

15356

18972

269108

315129

414177

101212

F254203254

3 353

494

5115

7187

10259

174316

215319

297827

349231

4512441

15951

24475

4,5,6456

H

127152152152

333

3333

3333

3333

3

33

7

33

9

3

15

3

888

H127152203

833

1233

2263

2973

44113

62153

108265

136336

101010

H152203254

433

533

1033

1333

1933

2743

4563

5683

81123

95143

126183

1212

H203254

33

33

43

63

93

154

195

277

329

4211

5315

8022

101212

J127127152

4 673

11145

15197

232911

334215

587528

739535

10814253

12816863

17322986

299113

467178

22 VAV-PRC011-EN


Table 8. Heating capacity (MBh) - inlet size 04, 05, 06 (I-P)

Rows GpmPressure Drop

(ft H20)

Airflow (Cfm)

50 100 150 200 250 300 350 400 450 500

1-Row Capacity

MBH

0.51.01.52.02.5

0.511.703.475.768.54

4.294.584.694.754.79

5.886.496.726.846.92

6.957.848.198.388.49

7.798.959.419.679.83

8.519.9110.4910.8111.01

9.1410.7711.4611.8412.09

9.7011.5412.3512.8013.09

10.1812.2513.1713.6814.01

10.6212.9013.9314.5114.89

11.0213.5214.6415.2915.71

2-Row Capacity

MBH

0.51.01.52.02.5

0.180.601.242.073.09

5.725.905.965.996.01

9.6310.2410.4610.5710.64

12.4513.5914.0114.2314.36

14.5816.2616.8917.2317.44

16.2518.4419.2919.7520.04

17.6020.2821.3421.9122.27

18.7221.8523.1123.7924.23

19.6623.2024.6525.4525.95

20.4724.3926.0226.9227.49

21.1925.4527.2528.2428.88

3-Row Capacity

MBH

1.02.03.04.05.0

0.882.986.1510.3215.44

4.664.774.804.824.83

10.2610.7510.9211.0111.06

14.1115.1815.5615.7515.86

16.9218.6519.2719.5919.79

19.0921.4822.3622.8223.10

20.8523.8925.0325.6426.01

22.3526.0127.4328.1828.65

23.6727.9529.6430.5531.11

24.8729.7631.7332.7933.46

25.9731.4833.7334.9535.72

4-Row Capacity

MBH

1.02.03.04.05.0

1.153.908.0113.4120.02

5.325.425.465.485.49

11.4211.8612.0112.0812.12

15.9316.9917.3317.5017.61

19.3721.1021.8222.1322.31

22.0624.7325.6626.1326.42

24.2527.7629.0329.6830.08

26.1130.4632.0732.9133.43

27.7232.9034.8835.9236.56

29.1635.1737.5238.7639.53

30.4837.3140.0341.4942.39

Note: Refer to the Hot Water Reheat & Coil Notes (I-P) at the end of the Performance Data section for fouling factors and LAT/WTD calculating equations.

Table 9. Heating capacity (MBh) - inlet size 08 (I-P)


(ft H20)

Airflow (Cfm)

105 200 300 400 500 600 700 800 900

1-Row Capacity

MBH

0.51.01.52.02.5

0.692.284.637.6911.40

6.967.704.998.158.24

9.01910.3710.9211.2111.40

10.5612.4313.2413.6813.96

11.7414.1115.1715.7616.14

12.6915.5616.8517.5918.07

13.4716.8418.3419.2319.80

14.1417.9719.6920.7121.39

14.7018.9820.9322.0822.84

15.2219.8922.0723.3324.19

2-Row Capacity

MBH

2.04.06.08.010.012.0

0.321.142.404.096.208.71

10.5711.0511.2211.3111.3611.40

16.3317.6718.1718.4418.6018.72

20.4322.7423.6324.1124.4124.61

23.3926.6027.8728.5629.0029.30

25.6529.6631.3032.1932.7633.15

27.4332.1734.1435.2235.9236.40

28.8934.2836.5437.8138.6239.18

30.1036.0738.6240.0540.9641.61

31.1337.6240.4342.0143.0343.75

3-Row Capacity

MBH

2.04.06.08.010.012.0

0.301.202.404.106.108.50

10.8711.2311.3511.4211.4511.48

19.2720.5621.0121.2421.3821.48

25.0927.5628.4628.9429.2329.43

29.2532.9234.3135.0435.5035.82

32.5237.3639.2540.2640.8941.33

35.3141.2943.6844.9745.7946.35

37.7744.947.8149.450.4151.11

40.0348.3151.7653.6754.8855.73

42.1251.5755.5957.8359.2660.26

4-Row Capacity

MBH

2.04.06.08.010.012.0

0.491.713.576.049.0912.72

12.1212.4312.5312.5812.6112.64

21.7722.9623.3523.5523.6723.76

28.9331.4932.3732.8333.1033.29

34.1838.2639.7340.4940.9541.27

38.3843.9546.0347.1347.8148.27

41.8848.9651.753.1554.0654.68

44.9653.5556.9658.7959.9460.73

47.7357.8561.9664.1965.666.57

50.2761.9266.7769.4371.1272.28


VAV-PRC011-EN 23




(ft H20)

Airflow (Cfm)

200 300 400 500 600 700 800 900 1000 1200 1400

1-Row Capacity

MBH

0.71.01.52.02.5

1.713.176.4210.6415.77

11.8012.6013.2913.6613.90

13.8715.0416.0516.6116.96

15.6016.9818.3119.0519.52

17.0118.6720.2721.1821.77

18.2120.1822.0023.1023.80

19.2421.5123.5824.8425.67

20.1422.6925.0626.4527.40

20.9523.7726.4227.9429.01

21.6724.7527.6829.3730.51

22.9226.4729.9331.9633.29

23.9627.9431.8934.2535.81

2-Row Capacity

MBH

2.04.06.08.010.0

0.672.445.239.0113.76

18.8119.9520.3620.5720.70

24.4126.5727.3627.7728.03

28.6731.8833.0933.7234.12

32.0336.2537.8838.7539.29

34.7639.9341.9743.0743.76

37.0243.0845.5146.8347.66

38.9345.8248.6350.1651.13

40.5748.2251.3853.1254.22

42.0250.3653.8555.7857.01

44.4353.9958.1060.3961.86

46.3556.9761.6464.2665.94

3-Row Capacity

MBH

2.04.06.08.010.0

0.903.006.3010.6016.00

19.7220.7021.0321.2021.31

27.3029.4230.1630.5430.77

32.8136.1637.3738.0038.38

36.9941.5943.2944.1844.73

40.3446.1448.3449.5150.23

43.1750.1252.8054.2655.15

45.6453.7156.9058.6259.69

47.8657.0360.7262.7263.97

49.8960.1564.3566.6368.07

53.5865.9971.2374.1175.95

56.8771.4677.7881.3183.57

4-Row Capacity

MBH

2.04.06.08.010.0

1.304.559.5416.1824.41

22.8923.7524.0324.1724.25

32.2934.3435.0135.3435.53

39.5243.1344.3344.9345.30

45.1850.5152.3553.2853.84

49.7656.8559.3860.6761.46

53.6162.4465.6967.3768.39

56.9367.4971.4773.5574.83

59.8772.1376.8779.3780.91

62.5376.4881.9984.9286.74

67.2384.5191.6295.4697.87

71.391.9100.7105.5108.6




(ft H20)

Airflow (Cfm)

300 500 700 900 1100 1300 1500 1700 1900 2000

1-Row Capacity MBH

1.02.03.04.05.0

0.662.294.788.0912.19

16.1318.2919.1419.5919.88

19.4922.7824.1524.9025.38

21.9926.2328.0929.1229.78

2393729.0831.4132.7233.57

25.5031.5934.3135.8936.91

26.8233.7736.8738.7239.92

27.9435.7039.2141.2942.67

28.9137.4341.3543.6445.19

29.7738.9843.3045.8147.52

30.1639.7044.2246.8548.62

2-Row Capacity MBH

2.05.08.011.014.0

0.241.343.265.989.47

25.7528.9929.8730.2930.54

34.0640.7442.6943.6344.20

39.4649.3652.4153.9354.84

43.2756.0060.1262.1963.44

46.1961.3266.4169.0170.59

48.4465.6971.6874.7776.67

50.2469.3676.1879.7281.91

51.7272.5080.0784.0486.50

52.9575.2283.4887.8590.57

53.5176.4585.0389.5992.43

3-Row Capacity MBH

2.05.08.011.014.017.0

0.301.704.207.6011.9017.20

28.9831.8432.5632.8933.0933.22

41.2248.3850.3051.2051.7252.07

48.6660.2563.5765.1666.0966.71

53.7969.4574.2076.5277.9078.82

57.6977.1183.2986.3688.2089.43

60.9083.8591.4795.3097.6299.17

63.6590.0099.07103.7106.5108.4

66.0895.73106.3111.8115.1117.4

68.27101.2113.3119.6123.5126.1

69.29103.8116.7123.4127.6130.5

4-Row Capacity MBH

2.05.08.011.014.017.0

0.402.084.958.9414.0020.12

32.5535.2335.8636.1436.3036.40

47.0754.5756.4057.2457.7158.02

56.1669.2372.7174.3275.2575.86

62.3780.8286.1188.6290.0891.04

67.0490.5097.67101.1103.2104.5

70.7798.96108.0112.5115.1116.9

73.91106.6117.6123.1126.4128.6

76.63113.6126.6133.2137.2139.9

79.03120.2135.3143.0147.7150.9

80.13123.4139.5147.8152.9156.3


24 VAV-PRC011-EN




(ft H20)

Airflow (Cfm)

400 700 1000 1300 1600 1900 2200 2500 2800 3000

1-Row Capacity MBH

2.03.04.05.06.07.0

1.192.484.186.288.7711.64

24.9226.4427.2727.8028.1628.42

31.5334.0835.5136.4337.0737.54

36.4539.9141.9243.2344.1544.83

40.5444.7547.3349.0250.2251.11

43.9349.0252.0554.1255.5956.70

46.8252.7756.2658.6960.4361.75

49.3356.1060.1362.8364.8566.37

51.5359.0763.6266.6668.9070.64

53.4961.7666.8070.2172.6674.59

54.6863.4268.7972.4275.0577.07

2-Row Capacity MBH

5.09.013.017.021.023.0

1.063.246.5510.9716.4919.65

38.4540.1940.9041.2841.5341.62

55.2359.3761.1262.0862.7062.93

66.9473.5376.3877.9879.0279.41

75.6484.5088.4490.6792.1292.67

82.3993.3298.27101.1103.0103.7

87.82100.6106.5109.9112.1113.0

92.29106.8113.5117.4120.0121.0

96.10112.0119.6124.0126.9128.0

99.37116.6124.9129.8133.0134.2

101.30119.40128.10133.20136.70138.00

3-Row Capacity MBH

5.07.09.011.013.015.017.019.021.023.0

1.322.483.985.817.9710.4413.2416.3619.7923.53

41.7542.6643.1743.5043.7343.9044.0344.1444.2244.29

65.7768.4269.9470.9271.6172.1172.5172.8273.0873.29

81.9386.5889.3091.0892.3493.2894.0194.6095.0795.47

93.87100.5104.4107.1108.9110.3111.4112.3113.0113.6

103.5112.0117.2120.6123.1125.0126.5127.7128.6129.4

111.8122.1128.5132.8136.0138.3140.2141.7142.9144.0

119.2131.3138.9144.2147.9150.8153.1154.9156.5157.7

126.0139.9148.8154.9159.4162.8165.5167.7169.5171.1

132.3148.1158.2165.3170.5174.5177.7180.2182.4184.2

136.2153.3164.3172.0177.7182.1185.6188.4190.8192.8

4-Row Capacity MBH

5.07.09.011.013.015.017.019.021.023.0

1.572.924.666.789.2612.1215.3318.9022.8227.09

46.3447.1647.6047.8848.0848.2248.3348.4248.4948.54

74.3677.0078.4679.3980.0380.4980.8581.1381.3681.55

94.2799.35102.2104.1105.4106.3107.1107.6108.1108.5

109.2116.8121.3124.2126.2127.8128.9129.9130.6131.2

121.2131.3137.4141.4144.3146.4148.0149.4150.4151.3

131.3144.0151.7156.8160.5163.3165.4167.2168.6169.8

140.3155.4164.7171.1175.6179.1181.8183.9185.7187.2

148.3165.9176.9184.5189.9194.1197.4200.0202.1204.0

155.7175.7188.4197.3203.7208.6212.5215.6218.2220.3

160.3181.9195.8205.5212.6218.0222.3225.8228.6231.0


VAV-PRC011-EN 25




(ft H20)

Airflow (Cfm)

600 1000 1400 1800 2200 2600 3000 3400 3800 4000

1-Row Capacity

MBH

2.03.04.05.06.07.08.0

1.332.754.626.929.6512.7915.70

32.4634.9536.3437.2237.8338.2838.63

39.8743.7145.9647.4148.4349.1949.77

45.5650.4953.5455.5656.9858.0458.87

50.0456.2959.9262.4964.3265.6966.76

53.7361.1965.6168.5770.8072.4873.79

56.8365.4470.6274.0876.6078.5980.15

59.5069.1775.0979.0781.9484.1685.95

61.8272.4879.1083.5986.8589.3191.30

63.8675.4582.7387.7291.3594.1196.27

64.7976.8384.4289.6593.4796.3698.65

2-Row Capacity

MBH

5.07.09.011.013.015.017.019.021.023.0

1.122.123.415.006.889.0411.4914.2317.2420.54

53.2755.3456.5457.3357.8958.3058.6358.8859.0959.27

72.0076.2778.8280.5281.7382.6583.3683.9384.4084.79

84.8291.1595.0297.6499.53101.0102.1103.0103.7104.3

94.20102.4107.5110.9113.5115.4116.9118.1119.1120.0

101.4111.2117.4121.6124.7127.1129.0130.5131.8132.8

107.3118.3125.5130.5134.1136.9139.1140.9142.4143.7

112.1124.3132.3137.9142.1145.3147.8149.9151.6153.0

116.1129.4138.1144.3148.9152.5155.3157.6159.5161.2

119.5133.8143.2149.9154.9158.8161.9164.4166.5168.3

121.0135.8145.5152.4157.6161.7164.9167.5169.7171.6

3-Row Capacity

MBH

5.07.09.011.013.015.017.019.021.023.0

1.422.654.246.178.4511.0714.0217.3120.9224.86

60.5762.4763.5464.2264.6965.0565.3265.5365.7065.85

86.9791.6794.3896.1497.3898.2999.0099.57100.0100.4

104.4111.9116.5119.4121.5123.1124.4125.3126.1126.8

117.3127.6133.9138.1141.1143.4145.1146.6147.7148.7

127.8140.7148.7154.2158.1161.1163.5165.2166.9168.2

136.9152.4162.1168.8173.7177.5180.4182.8184.7186.4

145.1163.1174.6182.6188.5193.0196.5199.4201.8203.8

152.6173.0186.4195.7202.6207.9212.2215.6218.4220.8

159.5182.4197.6208.3216.3222.5227.4231.4234.7237.5

162.7186.9203.0214.4223.0229.6234.9239.2242.8245.8

4-Row Capacity

MBH

5.07.09.011.013.015.017.019.021.023.0

1.693.145.07.269.9212.9516.3720.1624.3328.88

67.5669.3570.3270.9371.3471.6571.8872.0672.2172.33

99.10104.1106.9108.7109.9110.8111.5112.0112.4112.8

120.6129.3134.4137.6139.9141.6142.9143.9144.8145.5

136.5148.9156.3161.1164.6167.2169.2170.8172.0173.1

149.2165.2174.9181.4186.1189.6192.4194.5196.3197.8

160.0179.4191.5199.7205.7210.2213.7216.5218.8220.8

169.5192.2206.7216.7224.0229.5233.8237.4240.2242.7

178.0204.0220.9232.7241.4248.0253.2257.4260.9263.8

185.7214.9234.9247.9258.0265.8271.9276.9281.1284.5

189.3220.0240.6255.3266.1274.5281.1286.5291.0294.7


26 VAV-PRC011-EN


Table 14. Heating capacity (MBh) - Inlet size 16 x 24 (I-P)

Rows Gpm

Pressure Drop

(ft H20)

Airflow (Cfm)

800 1200 1800 2400 3000 3600 4200 4800 5400 6000 6600 7200 8000

1-Row Capacity

MBH

2.03.04.05.06.07.08.00

1.463.015.057.5610.5313.9517.11

39.0642.6144.6045.8846.7847.4447.95

45.9050.6353.5455.4456.7757.7658.53

53.4160.1664.0866.8768.8670.3571.51

58.9367.6872.8676.2978.8880.8682.42

63.6273.8080.1984.4987.5789.9691.91

66.8678.9386.4691.5895.2998.10100.30

69.8283.3291.9197.82102.1105.4108.0

72.3287.1296.70103.4108.2112.0115.0

74.4690.46101.0108.3113.8118.0121.3

76.3293.41104.8112.8118.8123.4127.1

77.9696.04108.2116.9123.4128.4132.4

79.4098.41111.3120.6127.6133.0137.4

81.10101.2115.1125.1132.7138.7143.4

2-Row Capacity

MBH

5.07.09.011.013.015.017.019.021.023.0

1.392.604.166.058.2910.8613.7616.9820.5324.39

66.8770.0771.9473.1774.0474.6945.2075.6075.9376.21

83.8789.4192.7494.9696.5597.7498.6899.42100.0100.6

101.0109.7115.1118.8121.5123.5125.1126.4127.4128.3

112.7124.0131.2136.2139.9142.6144.8146.6148.1149.3

121.3134.7143.5149.6154.1157.6160.4162.6164.5166.0

127.9143.2153.2160.3165.6169.7173.0175.6177.9179.7

133.1150.0161.1169.2175.1179.8183.5186.5189.1191.2

137.3155.7167.9176.6183.2188.3192.4195.8198.6201.0

140.8160.5173.6183.0190.1195.7200.2203.8206.9209.5

143.8164.5178.5188.5196.1202.1206.9210.9214.2217.0

146.4168.1182.8193.4201.4207.8212.9217.1220.7223.7

148.6171.2186.6197.7206.2212.8218.2222.7226.5229.7

151.2174.8191.0202.8211.8218.8224.5229.3233.3236.7

3-Row Capacity

MBH

5.07.09.011.013.015.017.019.021.023.0

1.512.824.496.548.9411.7014.8018.2622.0526.19

77.6780.8282.5983.7384.5285.1085.5585.9086.1986.43

101.4107.6111.3113.6115.3116.5117.5118.2118.8119.3

124.4135.2141.7146.1149.2151.5153.3154.8156.0157.0

140.4155.4164.8171.1175.7179.2181.9184.1185.9187.4

153.2172.2184.3192.6198.7203.4207.0210.0212.4214.5

164.1186.9201.8212.2219.9225.8230.5234.2237.4240.0

173.8200.3218.0230.5239.9247.1252.9257.6261.5264.8

182.5212.6233.2247.9259.0267.7274.6280.2285.0289.0

190.2224.0247.4264.4277.4287.5295.6302.3307.9312.7

197.3234.5260.7280.1294.9306.6316.0323.8330.4335.9

203.6244.1273.2295.0311.7325.0335.8344.7352.2358.7

209.3253.0284.9309.0327.7342.7354.8365.0373.5380.8

216.1263.8299.3326.5347.9365.1379.2391.0401.0409.6

4-Row Capacity

MBH

5.07.09.011.013.015.017.019.021.023.0

1.823.375.357.7510.5713.7917.4121.4325.8430.64

87.0790.1891.8692.9193.6394.1594.5594.8695.1195.32

115.5122.4126.2128.6130.3131.5132.5133.2133.8134.3

143.6156.5164.1169.1172.6175.1177.1178.7180.0181.0

162.9181.5192.9200.5205.9210.0213.2215.7217.8219.5

177.8201.7216.8227.2234.7240.3244.8248.3251.3253.7

190.1219.0237.9251.1260.7268.1273.9278.6282.4285.7

200.7234.5257.1273.1285.0294.2301.4307.3312.2316.3

209.9248.4274.7293.7307.9319.0327.8335.0340.9345.9

218.0260.9291.0313.0329.6342.7353.1361.7368.8374.8

225.2272.3306.0331.0350.2365.3377.5387.5395.8402.9

231.5282.6319.9347.9369.7386.9400.8412.3422.0430.2

237.1292.0332.7363.8388.0407.4423.2436.3447.4456.8

243.6303.1348.3383.3410.9433.2451.6466.9479.8490.9


VAV-PRC011-EN 27


Hot Water Reheat Coil Notes (I-P)

1. Fouling Factor = .0005

2. Capacity based on 55°F entering air temperature and 180°F entering water temperature. Referto correction factors found in Table 15, p. 28 and Table 16, p. 28 for different enteringconditions.

3. The following equations may be used in calculating Leaving AirTemperature (LAT) and WaterTemperature Difference (WTD).

4. For premium coils (.020” wall), side pressure drop increasesx 17% and water velocity increases7% for fixed GPM.

Table 15. Temperature correction factors for water pressure drop (ft)

Average Water TemperatureCorrection Factor

2000.970

1900.985

1801.000

1701.020

1601.030

1501.050

1401.080

1301.100

1201.130

1101.150

Table 16. Temperature correction factors for coil capacity (MBH)

Entering Water Minus Entering AirCorrection Factor

400.32

500.40

600.48

700.56

800.64

1000.80

1251.00

1401.12

1501.20

1601.28

1801.44

2001.60

Table 17. Coil only-water weights

Inlet Size

1-Row Coil 2-Row Coil 3-Row Coil 4-Row Coil

InternalVolume

Operating Weight

InternalVolume

Operating Weight

InternalVolume

Operating Weight

InternalVolume

Operating Weight

(in3) (gal) (lbs) (in3) (gal) (lbs) (in3) (gal) (lbs) (in3) (gal) (lbs)

04 9.37 0.041 5.3 23.68 0.102 6.9 33.52 0.145 23 43.08 0.186 24

05 9.37 0.041 5.3 23.68 0.102 6.9 33.52 0.145 23 43.08 0.186 24

06 9.37 0.041 5.3 23.68 0.102 6.9 33.52 0.145 23 43.08 0.186 24

08 12.78 0.055 5.5 35.47 0.154 9.0 48.89 0.212 24 61.92 0.268 26

10 19.06 0.083 7.7 48.83 0.211 11.7 68.84 0.298 32 88.28 0.382 36

12 30.05 0.130 10.7 67.34 0.292 15.5 98.89 0.428 41 129.54 0.561 45

14 51.21 0.222 13.9 94.27 0.408 19.8 148.04 0.641 51 200.27 0.867 55

16 58.62 0.254 16.2 109.09 0.472 23.3 170.64 0.739 56 230.43 0.998 61

24x16 66.03 0.286 20.4 123.91 0.536 29.8 193.24 0.837 76 260.59 1.128 82

LAT EAT MBH 921.7Cfm

-------------------------------------- +=

WTD EWT LWT 2 MBHGpm

------------------------ =–=

28 VAV-PRC011-EN


Table 18. Heating capacity (kW) - inlet size 04, 05, 06 (SI)

Pressure Drop Airflow (L/s)Rows L/s (kPA) 24 47 71 94 118 142 165 189 212 236

1-Row Capacity

kW

0.2 1.5 1.26 1.72 2.04 2.28 2.49 2.68 2.84 2.98 3.11 3.23

0.5 5.1 1.34 1.90 2.30 2.62 2.90 3.16 3.38 3.59 3.78 3.96

0.7 10.4 1.38 1.97 2.40 2.76 3.07 3.36 3.62 3.86 4.08 4.29

0.9 17.2 1.39 2.01 2.45 2.83 3.17 3.47 3.75 4.01 4.25 4.48

1.2 25.5 1.40 2.03 2.49 2.88 3.23 3.54 3.84 4.11 4.36 4.60

2-Row Capacity

kW

0.2 0.5 1.68 2.82 3.65 4.27 4.76 5.16 5.49 5.76 6.00 6.21

0.5 1.8 1.73 3.00 3.98 4.77 5.40 5.94 6.40 6.80 7.15 7.46

0.7 3.7 1.75 3.07 4.11 4.95 5.65 6.25 6.77 7.22 7.63 7.99

0.9 6.2 1.75 3.10 4.17 5.05 5.79 6.42 6.97 7.46 7.89 8.28

1.2 9.2 1.76 3.12 4.21 5.11 5.87 6.53 7.10 7.61 8.06 8.46

3-Row Capacity

kW

0.5 2.6 1.37 3.01 4.14 4.96 5.59 6.11 6.55 6.94 7.29 7.61

0.9 8.9 1.40 3.15 4.45 5.47 6.30 7.00 7.62 8.19 8.72 9.23

1.4 18.4 1.41 3.20 4.56 5.65 6.55 7.34 8.04 8.69 9.30 9.89

1.9 30.8 1.41 3.23 4.62 5.74 6.69 7.51 8.26 8.95 9.61 10.24

2.4 46.2 1.42 3.24 4.65 5.80 6.77 7.62 8.40 9.12 9.81 10.47

4-Row Capacity

kW

0.5 3.4 1.56 3.35 4.67 5.68 6.47 7.11 7.65 8.12 8.55 8.93

0.9 11.7 1.59 3.48 4.98 6.18 7.25 8.14 8.93 9.64 10.31 10.93

1.4 23.9 1.60 3.52 5.08 6.39 7.52 8.51 9.40 10.22 11.00 11.73

1.9 40.1 1.61 3.54 5.13 6.49 7.66 8.70 9.64 10.53 11.36 12.16

2.4 59.8 1.61 3.55 5.16 6.54 7.74 8.82 9.80 10.71 11.59 12.42Note: Refer to the Hot Water Reheat & Coil Notes (SI) at the end of the Performance Data section for fouling factors and LAT/WTD calculating equations.

Table 19. Heating capacity (kW) - inlet size 08 (SI)

Pressure Drop Airflow (L/s)Rows L/s (kPA) 50 94 142 189 236 283 330 378 425

1-Row Capacity

kW

0.2 2.1 2.04 2.64 3.09 3.44 3.72 3.95 4.14 4.31 4.46

0.5 6.8 2.26 3.04 3.64 4.14 4.56 4.94 5.27 5.56 5.83

0.7 13.8 1.46 3.20 3.88 4.45 4.94 5.37 5.77 6.13 6.47

0.9 23.0 2.39 3.29 4.01 4.62 5.16 5.64 6.07 6.47 6.84

1.2 34.1 2.41 3.34 4.09 4.73 5.30 5.80 6.27 6.69 7.09

2-Row Capacity

kW

0.9 1.0 3.10 4.79 5.99 6.85 7.52 8.04 8.47 8.82 9.12

1.9 3.4 3.24 5.18 6.66 7.80 8.69 9.43 10.05 10.57 11.03

2.8 7.2 3.29 5.33 6.93 8.17 9.17 10.01 10.71 11.32 11.85

3.8 12.2 3.31 5.40 7.07 8.37 9.43 10.32 11.08 11.74 12.31

4.7 18.5 3.33 5.45 7.15 8.50 9.60 10.53 11.32 12.00 12.61

3-Row Capacity

kW

0.9 0.9 3.19 5.65 7.35 8.57 9.53 10.35 11.07 11.73 12.34

1.9 3.6 3.29 6.03 8.08 9.65 10.95 12.10 13.16 14.16 15.11

2.8 7.2 3.33 6.16 8.34 10.06 11.50 12.80 14.01 15.17 16.29

3.8 12.3 3.35 6.22 8.48 10.27 11.80 13.18 14.48 15.73 16.95

4.7 18.2 3.36 6.27 8.57 10.40 11.98 13.42 14.77 16.08 17.37

4-Row Capacity

kW

0.9 1.5 3.55 6.38 8.48 10.02 11.25 12.27 13.18 13.99 14.73

1.9 5.1 3.64 6.73 9.23 11.21 12.88 14.35 15.69 16.95 18.15

2.8 10.7 3.67 6.84 9.49 11.64 13.49 15.15 16.69 18.16 19.57

3.8 18.1 3.69 6.90 9.62 11.87 13.81 15.58 17.23 18.81 20.35

4.7 27.2 3.70 6.94 9.70 12.00 14.01 15.84 17.57 19.23 20.84Note: Refer to the Hot Water Reheat & Coil Notes (SI) at the end of the Performance Data section for fouling factors and LAT/WTD calculating equations.

VAV-PRC011-EN 29



Pressure Drop Airflow (L/s)Rows L/s (kPA) 94 142 189 236 283 330 378 425 472 566 661

1-Row Capacity

kW

0.3 5.1 3.46 4.06 4.57 4.99 5.34 5.64 5.90 6.14 6.35 6.72 7.020.5 9.5 3.69 4.41 4.98 5.47 5.91 6.30 6.65 6.97 7.25 7.76 8.190.7 19.2 3.89 4.70 5.37 5.94 6.45 6.91 7.34 7.74 8.11 8.77 9.350.9 31.8 4.00 4.87 5.58 6.21 6.77 7.28 7.75 8.19 8.61 9.37 10.041.2 47.1 4.07 4.97 5.72 6.38 6.98 7.52 8.03 8.50 8.94 9.76 10.49

2-Row Capacity

kW

0.9 2.0 5.51 7.15 8.40 9.39 10.19 10.85 11.41 11.89 12.31 13.02 13.581.9 7.3 5.85 7.79 9.34 10.62 11.70 12.63 13.43 14.13 14.76 15.82 16.702.8 15.6 5.97 8.02 9.70 11.10 12.30 13.34 14.25 15.06 15.78 17.03 18.063.8 26.9 6.03 8.14 9.88 11.36 12.62 13.72 14.70 15.57 16.35 17.70 18.834.7 41.1 6.07 8.21 10.00 11.51 12.82 13.97 14.98 15.89 16.71 18.13 19.33

3-Row Capacity

kW

0.9 2.7 5.78 8.00 9.62 10.84 11.82 12.65 13.38 14.03 14.62 15.70 16.671.9 9.0 6.07 8.62 10.60 12.19 13.52 14.69 15.74 16.71 17.63 19.34 20.942.8 18.8 6.16 8.84 10.95 12.69 14.17 15.47 16.68 17.80 18.86 20.88 22.803.8 31.7 6.21 8.95 11.14 12.95 14.51 15.90 17.18 18.38 19.53 21.72 23.834.7 47.8 6.25 9.02 11.25 13.11 14.72 16.16 17.49 18.75 19.95 22.26 24.49

4-Row Capacity

kW

0.9 3.9 6.71 9.46 11.58 13.24 14.58 15.71 16.68 17.55 18.33 19.70 20.901.9 13.6 6.96 10.06 12.64 14.80 16.66 18.30 19.78 21.14 22.41 24.77 26.932.8 28.5 7.04 10.26 12.99 15.34 17.40 19.25 20.95 22.53 24.03 26.85 29.513.8 48.4 7.08 10.36 13.17 15.61 17.78 19.74 21.56 23.26 24.89 27.98 30.924.7 73.0 7.11 10.41 13.28 15.78 18.01 20.04 21.93 23.71 25.42 28.68 31.83

Note: Refer to the Hot Water Reheat & Coil Notes (SI) at the end of the Performance Data section for fouling factors and LAT/WTD calculating equations.



1-Row Capacity

kW

0.5 2.0 4.73 5.71 6.44 7.01 7.47 7.86 8.19 8.47 8.72 8.84

0.9 6.8 5.36 6.68 7.69 8.52 9.26 9.90 10.46 10.97 11.42 11.63

1.4 14.3 5.61 7.08 8.23 9.21 10.06 10.81 11.49 12.12 12.69 12.96

1.9 24.2 5.74 7.30 8.53 9.59 10.52 11.35 12.10 12.79 13.43 13.73

2.4 36.4 5.83 7.44 8.73 9.84 10.82 11.70 12.51 13.24 13.93 14.25

2-Row Capacity

kW

0.9 0.7 7.55 9.98 11.56 12.68 13.54 14.20 14.72 15.16 15.52 15.68

2.4 4.0 8.50 11.94 14.47 16.41 17.97 19.25 20.33 21.25 22.04 22.41

3.8 9.7 8.75 12.51 15.36 17.62 19.46 21.01 22.33 23.47 24.47 24.92

5.2 17.9 8.88 12.79 15.81 18.23 20.22 21.91 23.36 24.63 25.75 26.26

6.6 28.3 8.95 12.95 16.07 18.59 20.69 22.47 24.01 25.35 26.54 27.09

3-Row Capacity

kW

0.9 0.9 8.49 12.08 14.26 15.76 16.91 17.85 18.65 19.37 20.01 20.31

2.4 5.1 9.33 14.18 17.66 20.35 22.60 24.57 26.38 28.06 29.66 30.42

3.8 12.6 9.54 14.74 18.63 21.75 24.41 26.81 29.03 31.15 33.20 34.20

5.2 22.7 9.64 15.01 19.10 22.43 25.31 27.93 30.39 32.77 35.05 36.16

6.6 35.6 9.70 15.16 19.37 22.83 25.85 28.61 31.21 33.73 36.19 37.40

8.0 51.4 9.74 15.26 19.55 23.10 26.21 29.06 31.77 34.41 36.96 38.25

4-Row Capacity

kW

0.9 1.2 9.54 13.79 16.46 18.28 19.65 20.74 21.66 22.46 23.16 23.48

2.4 6.2 10.32 15.99 20.29 23.69 26.52 29.00 31.24 33.29 35.23 36.16

3.8 14.8 10.51 16.53 21.31 25.24 28.62 31.65 34.47 37.10 39.65 40.88

5.2 26.7 10.59 16.78 21.78 25.97 29.63 32.97 36.08 39.04 41.91 43.32

6.6 41.9 10.64 16.91 22.05 26.40 30.24 33.73 37.04 40.21 43.29 44.81


30 VAV-PRC011-EN




1-Row Capacity

kW

0.9 3.6 7.30 9.24 10.68 11.88 12.87 13.72 14.46 15.10 15.68 16.03

1.4 7.4 7.75 9.99 11.70 13.11 14.37 15.47 16.44 17.31 18.10 18.59

1.9 12.5 7.99 10.41 12.29 13.87 15.25 16.49 17.62 18.65 19.58 20.16

2.4 18.8 8.15 10.68 12.67 14.37 15.86 17.20 18.41 19.54 20.58 21.22

2.8 26.2 8.25 10.86 12.94 14.72 16.29 17.71 19.01 20.19 21.29 21.99

3.3 34.8 8.33 11.00 13.14 14.98 16.62 18.10 19.45 20.70 21.86 22.59

2-Row Capacity

kW

2.4 3.2 11.27 16.19 19.62 22.17 24.15 25.74 27.05 28.16 29.12 29.69

4.2 9.7 11.78 17.40 21.55 24.76 27.35 29.48 31.30 32.82 34.17 34.99

6.1 19.6 11.99 17.91 22.38 25.92 28.80 31.21 33.26 35.05 36.60 37.54

8.0 32.8 12.10 18.19 22.85 26.57 29.63 32.21 34.41 36.34 38.04 39.04

9.9 49.3 12.17 18.38 23.16 27.00 30.19 32.85 35.17 37.19 38.98 40.06

10.9 58.7 12.20 18.44 23.27 27.16 30.39 33.12 35.46 37.51 39.33 40.44

3-Row Capacity

kW

2.4 4.0 12.24 19.28 24.01 27.51 30.33 32.77 34.93 36.93 38.77 39.92

3.3 7.4 12.50 20.05 25.37 29.45 32.82 35.78 38.48 41.00 43.40 44.93

4.2 11.9 12.65 20.50 26.17 30.60 34.35 37.66 40.71 43.61 46.36 48.15

5.2 17.4 12.75 20.78 26.69 31.39 35.34 38.92 42.26 45.40 48.44 50.41

6.1 23.8 12.82 20.99 27.06 31.92 36.08 39.86 43.35 46.72 49.97 52.08

7.1 31.2 12.87 21.13 27.34 32.33 36.63 40.53 44.20 47.71 51.14 53.37

8.0 39.6 12.90 21.25 27.55 32.65 37.07 41.09 44.87 48.50 52.08 54.39

9.0 48.9 12.94 21.34 27.72 32.91 37.43 41.53 45.40 49.15 52.81 55.21

9.9 59.1 12.96 21.42 27.86 33.12 37.69 41.88 45.87 49.68 53.46 55.92

10.9 70.3 12.98 21.48 27.98 33.29 37.92 42.20 46.22 50.14 53.98 56.50

4-Row Capacity

kW

2.4 4.7 13.58 21.79 27.63 32.00 35.52 38.48 41.12 43.46 45.63 46.98

3.3 8.7 13.82 22.57 29.12 34.23 38.48 42.20 45.54 48.62 51.49 53.31

4.2 13.9 13.95 22.99 29.95 35.55 40.27 44.46 48.27 51.84 55.21 57.38

5.2 20.3 14.03 23.27 30.51 36.40 41.44 45.95 50.14 54.07 57.82 60.23

6.1 27.7 14.09 23.45 30.89 36.99 42.29 47.04 51.46 55.65 59.70 62.31

7.1 36.2 14.13 23.59 31.15 37.45 42.91 47.86 52.49 56.89 61.13 63.89

8.0 45.8 14.16 23.69 31.39 37.78 43.37 48.47 53.28 57.85 62.28 65.15

9.0 56.5 14.19 23.78 31.53 38.07 43.78 49.00 53.90 58.61 63.19 66.18

9.9 68.2 14.21 23.84 31.68 38.28 44.08 49.41 54.42 59.23 63.95 67.00


VAV-PRC011-EN 31




1-Row Capacity

kW

0.9 4.0 9.51 11.68 13.35 14.67 15.75 16.66 17.44 18.12 18.72 18.99

1.4 8.2 10.24 12.81 14.80 16.50 17.93 19.18 20.27 21.24 22.11 22.52

1.9 13.8 10.65 13.47 15.69 17.56 19.23 20.70 22.01 23.18 24.25 24.74

2.4 20.7 10.91 13.89 16.28 18.31 20.10 21.71 23.17 24.50 25.71 26.27

2.8 28.8 11.09 14.19 16.70 18.85 20.75 22.45 24.01 25.45 26.77 27.39

3.3 38.2 11.22 14.42 17.01 19.25 21.24 23.03 24.66 26.17 27.58 28.24

3.8 46.9 11.32 14.59 17.25 19.57 21.63 23.49 25.19 26.76 28.21 28.91

2-Row Capacity

kW

2.4 3.3 15.61 21.10 24.86 27.61 29.72 31.45 32.85 34.03 35.02 35.46

3.3 6.3 16.22 22.35 26.71 30.01 32.59 34.67 36.43 37.92 39.21 39.80

4.2 10.2 16.57 23.10 27.85 31.51 34.41 36.78 38.77 40.47 41.97 42.64

5.2 14.9 16.80 23.60 28.62 32.50 35.64 38.25 40.41 42.29 43.93 44.66

6.1 20.6 16.97 23.95 29.17 33.26 36.55 39.30 41.65 43.64 45.40 46.19

7.1 27.0 17.09 24.22 29.60 33.82 37.25 40.12 42.58 44.69 46.54 47.39

8.0 34.3 17.18 24.43 29.92 34.26 37.81 40.77 43.32 45.51 47.45 48.33

9.0 42.5 17.26 24.60 30.19 34.61 38.25 41.29 43.93 46.19 48.18 49.09

9.9 51.5 17.32 24.74 30.39 34.90 38.63 41.73 44.43 46.74 48.80 49.73

10.9 61.4 17.37 24.85 30.57 35.17 38.92 42.11 44.84 47.24 49.32 50.29

3-Row Capacity

kW

2.4 4.2 17.75 25.49 30.60 34.38 37.45 40.12 42.52 44.72 46.74 47.68

3.3 7.9 18.31 26.87 32.79 37.40 41.24 44.66 47.80 50.70 53.46 54.77

4.2 12.7 18.62 27.66 34.14 39.24 43.58 47.51 51.17 54.63 57.91 59.49

5.2 18.5 18.82 28.18 34.99 40.47 45.19 49.47 53.51 57.35 61.05 62.83

6.1 25.3 18.96 28.54 35.61 41.35 46.33 50.91 55.24 59.38 63.39 65.35

7.1 33.1 19.06 28.81 36.08 42.03 47.21 52.02 56.56 60.93 65.21 67.29

8.0 41.9 19.14 29.01 36.46 42.52 47.92 52.87 57.59 62.19 66.64 68.84

9.0 51.7 19.20 29.18 36.72 42.96 48.42 53.57 58.44 63.19 67.82 70.10

9.9 62.5 19.25 29.31 36.96 43.29 48.91 54.13 59.14 64.01 68.78 71.16

10.9 74.3 19.30 29.42 37.16 43.58 49.29 54.63 59.73 64.71 69.60 72.04

4-Row Capacity

kW

2.4 5.1 19.80 29.04 35.34 40.00 43.73 46.89 49.68 52.17 54.42 55.48

3.3 9.4 20.32 30.51 37.89 43.64 48.42 52.58 56.33 59.79 62.98 64.48

4.2 15.0 20.61 31.33 39.39 45.81 51.26 56.12 60.58 64.74 68.64 70.51

5.2 21.7 20.79 31.86 40.33 47.21 53.16 58.53 63.51 68.20 72.65 74.82

6.1 29.6 20.91 32.21 41.00 48.24 54.54 60.28 65.65 70.75 75.61 77.99

7.1 38.7 21.00 32.47 41.50 49.00 55.57 61.60 67.26 72.68 77.90 80.45

8.0 48.9 21.07 32.68 41.88 49.59 56.39 62.63 68.52 74.21 79.69 82.38

9.0 60.3 21.12 32.82 42.17 50.06 57.00 63.45 69.58 75.44 81.15 83.96

9.9 72.7 21.16 32.94 42.44 50.41 57.53 64.12 70.40 76.46 82.38 85.28


32 VAV-PRC011-EN


Table 24. Heating capacity (kW) - inlet size 16x24 (SI)

Pressure Drop Airflow (L/s)

Rows L/s (kPA) 378 566 850 1133 1416 1699 1982 2265 2549 2832 3115 3398 3776

1-Row Capacity

kW

0.9 4.4 11.45 13.45 15.65 17.27 18.65 19.59 20.46 21.19 21.82 22.37 22.85 23.27 23.77

1.4 9.0 12.49 14.84 17.63 19.84 21.63 23.13 24.42 25.53 26.51 27.38 28.15 28.84 29.66

1.9 15.1 13.07 15.69 18.78 21.35 23.50 25.34 26.94 28.34 29.60 30.71 31.71 32.62 33.73

2.4 22.6 13.45 16.25 19.60 22.36 24.76 26.84 28.67 30.30 31.74 33.06 34.26 35.34 36.66

2.8 31.5 13.71 16.64 20.18 23.12 25.66 27.93 29.92 31.71 33.35 34.82 36.16 37.40 38.89

3.3 41.7 13.90 16.93 20.62 23.70 26.36 28.75 30.89 32.82 34.58 36.16 37.63 38.98 40.65

3.8 51.1 14.05 17.15 20.96 24.15 26.94 29.40 31.65 33.70 35.55 37.25 38.80 40.27 42.03

2-Row Capacity

kW

2.4 4.2 19.60 24.58 29.60 33.03 35.55 37.48 39.01 40.24 41.26 42.14 42.91 43.55 44.31

3.3 7.8 20.54 26.20 32.15 36.34 39.48 41.97 43.96 45.63 47.04 48.21 49.27 50.17 51.23

4.2 12.4 21.08 27.18 33.73 38.45 42.06 44.90 47.21 49.21 50.88 52.31 53.57 54.69 55.98

5.2 18.1 21.44 27.83 34.82 39.92 43.84 46.98 49.59 51.76 53.63 55.24 56.68 57.94 59.43

6.1 24.8 21.70 28.30 35.61 41.00 45.16 48.53 51.32 53.69 55.71 57.47 59.02 60.43 62.07

7.1 32.5 21.89 28.64 36.19 41.79 46.19 49.73 52.69 55.19 57.35 59.23 60.90 62.37 64.12

8.0 41.1 13.25 28.92 36.66 42.44 47.01 50.70 53.78 56.39 58.67 60.64 62.39 63.95 65.79

9.0 50.8 22.16 29.14 37.04 42.96 47.65 51.46 54.66 57.38 59.73 61.81 63.63 65.27 67.20

9.9 61.4 22.25 29.31 37.34 43.40 48.21 52.14 55.42 58.20 60.64 62.78 64.68 66.38 68.37

10.9 72.9 22.33 29.48 37.60 43.76 48.65 52.66 56.04 58.91 61.40 63.60 65.56 67.32 69.37

3-Row Capacity

kW

2.4 4.5 22.76 29.72 36.46 41.15 44.90 48.09 50.94 53.49 55.74 57.82 59.67 61.34 63.33

3.3 8.4 23.69 31.53 39.62 45.54 50.47 54.77 58.70 62.31 65.65 68.73 71.54 74.15 77.31

4.2 13.4 24.20 32.62 41.53 48.30 54.01 59.14 63.89 68.34 72.51 76.40 80.07 83.50 87.72

5.2 19.5 24.54 33.29 42.82 50.14 56.45 62.19 67.55 72.65 77.49 82.09 86.46 90.56 95.69

6.1 26.7 24.77 33.79 43.73 51.49 58.23 64.45 70.31 75.91 81.30 86.43 91.35 96.04 101.96

7.1 35.0 24.94 34.14 44.40 52.52 59.61 66.18 72.42 78.46 84.26 89.86 95.25 100.44 107.00

8.0 44.2 25.07 34.44 44.93 53.31 60.67 67.55 74.12 80.48 86.63 92.61 98.41 103.98 111.13

9.0 54.6 25.17 34.64 45.37 53.95 61.54 68.64 75.50 82.12 88.60 94.90 101.02 106.97 114.59

9.9 65.9 25.26 34.82 45.72 54.48 62.25 69.58 76.64 83.53 90.24 96.83 103.22 109.46 117.52

10.9 78.3 25.33 34.96 46.01 54.92 62.86 70.34 77.61 84.70 91.64 98.44 105.12 111.60 120.04

4-Row Capacity

kW

2.4 5.4 25.52 33.85 42.08 47.74 52.11 55.71 58.82 61.52 63.89 66.00 67.85 69.49 71.39

3.3 10.1 26.43 35.87 45.87 53.19 59.11 64.18 68.73 72.80 76.46 79.80 82.82 85.58 88.83

4.2 16.0 26.92 36.99 48.09 56.53 63.54 69.72 75.35 80.51 85.28 89.68 93.75 97.50 102.08

5.2 23.2 27.23 37.69 49.56 58.76 66.59 73.59 80.04 86.07 91.73 97.01 101.96 106.62 112.33

6.1 31.6 27.44 38.19 50.58 60.34 68.78 76.40 83.53 90.24 96.60 102.63 108.35 113.71 120.42

7.1 41.2 27.59 38.54 51.32 61.54 70.42 78.57 86.22 93.49 100.44 107.06 113.39 119.40 126.96

8.0 52.0 27.71 38.83 51.90 62.48 71.74 80.27 88.33 96.07 103.48 110.63 117.46 124.03 132.35

9.0 64.1 27.80 39.04 52.37 63.22 72.77 81.65 90.06 98.18 106.00 113.57 120.83 127.87 136.83

9.9 77.2 27.87 39.21 52.75 63.83 73.65 82.76 91.50 99.91 108.08 116.00 123.68 131.12 140.62

10.9 91.6 27.94 39.36 53.05 64.33 74.35 83.73 92.70 101.37 109.84 118.08 126.08 133.87 143.87Note: Refer to the Hot Water Reheat & Coil Notes (SI) at the end of the Performance Data section for fouling factors and LAT/WTD calculating equations.

VAV-PRC011-EN 33


g

Hot Water Reheat Coil Notes (SI)

1. Fouling Factor = 0.0005

2. Capacity based on 12°C entering air temperature and 82°C entering water temperature. Referto correction factors found in Table 15, p. 28 and Table 16, p. 28 for different enteringconditions.

3. The following equations may be used in calculating Leaving AirTemperature (LAT) and WaterTemperature Difference (WTD).

LAT = EAT + (kW x 0.83 / L/s)

WTD = EWT - LWT = (kW / (4.19) L/s)

4. For premium coils (.020” wall), side pressure drop increasesx 17% and water velocity increases7% for fixed GPM.

Table 25. Temperature correction factors for water pressure drop (kPa)

Average Water TemperatureCorrection Factor

930.970

880.985

821.000

771.020

711.030

661.050

601.080

541.100

491.130

431.150

Table 26. Temperature correction factors for coil capacity (kW)

Entering Water Minus Entering AirCorrection Factor

220.32

280.40

330.48

390.56

440.64

560.80

691.00

781.12

831.20

891.29

1001.45

1111.61

Table 27. Coil only-water weights (SI)

1-Row Coil 2-Row Coil 3-Row Coil 4-Row Coil

Inlet Size

Internal Volume(cm3)

Internal Volume(liter)

Operating Weight

(kg)



Operating Weight

(kg)



Operating Weight

(kg)



OperatinWeight

(kg)

04 153.6 0.154 2.421 388.0 0.388 3.12 549.3 0.549 10.44 705.9 0.706 10.90

05 153.6 0.154 2.421 388.0 0.388 3.12 549.3 0.549 10.44 705.9 0.706 10.90

06 153.6 0.154 2.421 388.0 0.388 3.12 549.3 0.549 10.44 705.9 0.706 10.90

08 209.4 0.209 2.477 581.3 0.580 4.099 801.1 0.801 10.90 1014.8 1.015 11.80

10 312.4 0.312 3.487 800.1 0.799 5.294 1128.1 1.128 14.53 1446.7 1.447 16.34

12 492.5 0.493 4.853 1103.0 1.101 7.026 1620.6 1.621 18.61 2122.8 2.123 20.43

14 839.1 0.839 6.309 1545.0 1.542 8.965 2425.9 2.426 23.15 3281.9 3.282 24.97

16 960.6 0.961 7.337 1788.0 1.784 10.57 2796.3 2.796 25.42 3776.1 3.776 27.69

24x16 1082.0 1.082 9.273 2030.0 2.027 13.53 3166.6 3.167 34.50 4270.3 4.270 37.23

34 VAV-PRC011-EN


Electrical Data

Table 28. VCEF electric coil kW guidelines - minimum to maximum

Single-Phase Voltage Three-Phase Voltage

Inlet Size Stages 120V 208V/240V 277V 347V 480V 208V 480V 575V(a) 380V/50 Hz

04123

1.01.01.0

1.01.01.0

1.01.01.0

1.01.0-

1.0--

1.01.01.0

1.01.0-

---

1.01.0-

05123

1.0-2.51.0-2.51.0-2.5

1.0-2.51.0-2.51.0-2.5

1.0-2.51.0-2.51.0-2.5

1.0-2.51.0-2.51.5-2.5

1.0-2.52.0-2.5

2.5

1.0-2.51.0-2.51.0-2.5

1.0-2.51.0-2.5

2.5

1.5-2.51.5-2.5

-

1.0-2.51.0-2.52.0-2.5

06123

1.0-4.01.0-4.01.0-4.0

1.0-4.01.0-4.0 1.0-4.0

1.0-4.01.0-4.01.0-4.0

1.0-4.01.0-4.01.5-4.0

1.0-4.02.0-4.02.5-4.0

1.0-4.01.0-4.01.0-4.0

1.0-4.01.0.4.02.5-4.0

1.5-4.01.5-4.0

4.0

1.0-4.01.0-4.02.0-4.0

08123

1.0-5.01.0-5.01.0-5.0

1.0-7.01.0-7.01.0-7.0

1.0-7.01.0-7.01.0-7.0

1.0-7.01.0-7.01.5-7.0

1.0-7.01.5-7.02.5-7.0

1.0-7.01.0-7.01.0-7.0

1.0-7.01.0-7.02.5-7.0

1.5-7.01.5-7.0

3.5-7.0(a)

1.0-7.01.0-7.01.5-7.0

10123

1.0-5.01.0-5.01.0-5.0

1.0-9.01.0-9.01.0-9.0

1.0-11.01.0-11.01.0-11.0

1.0-11.01.0-11.01.5-11.0

1.0-11.01.0-11.01.5-11.0

1.0-11.01.0-11.01.0-11.0

1.0-11.01.0-11.01.5-11.0

1.5-11.01.5-11.02.5-11.0

1.0-11.01.0-11.01.5-11.0

12123

1.0-5.01.0-5.01.0-5.0

1.0-9.01.0-9.01.0-9.0

1.0-13.01.0-13.01.0-13.0

1.0-16.01.0-16.01.5-16.0

1.0-16.01.0-16.01.5-16.0

1.0-15.01.0-15.01.0-15.0

1.0-16.01.0-16.01.5-16.0

1.5-15.01.5-15.02.0-15.0

1.0-16.01.0-16.01.5-16.0

14123

1.0-5.01.0-5.01.0-5.0

1.0-9.01.0-9.01.0-9.0

1.0-13.01.0-13.0 1.0-13.0

1.0-16.01.0-16.01.5-16.0

1.0-22.01.0-22.01.5-22.0

1.0-15.01.0-15.01.0-15.0

1.0-22.01.0-22.01.5-22.0

1.5-22.01.5-22.02.0-22.0

1.0-22.01.0-22.01.5-22.0

16123

1.0-5.01.0-5.01.0-5.0

1.0-9.01.0-9.01.0-9.0

1.0-13.01.0-13.01.0-13.0

1.0-16.01.0-16.01.5-16.0

1.0-22.01.0-22.01.5-22.0

1.0-15.01.0-15.01.0-15.0

1.0-30.01.0-30.01.5-30.0

1.5-30.01.5-30.02.0-30.0

1.0-26.01.0-26.01.5-26.0

24 x 16123

1.0-5.01.0-5.01.0-5.0

1.0-9.01.0-9.01.0-9.0

1.0-13.01.0-13.01.0-13.0

1.0-16.01.0-16.01.5-16.0

1.0-22.01.0-22.01.5-22.0

1.5-15.01.5-15.01.5-15.0

1.0-34.01.0-34.01.5-34.0

1.5-44.01.5-44.02.0-44.0

1.0-26.01.0-26.01.5-26.0

Notes:

1. Coils available with 24-volt magnetic or mercury contactors, load carrying P.E switches, and P.E. switch with magnetic or mercury contactors. 2. Available kW increments are by 0.5 kW from 1.0 to 8.0 kW, by 1.0 kW from 9.0 to 18.0 kW, and by 2.0 kW from 18.0 to 46.0 kW. 3. Each stage will be equal in kW output. 4. All heaters contain an auto-thermal cutout and a manual-reset cutout. 5. The current amp draw for the heater elements is calculated by the formula at the end of this section. 6. The maximum allowable kW is based on the largest kW possible per a voltage and the minimum airflow per an inlet size and kW. 7. SCR not available with 575V.

(a) No 5.5 kW available.

VAV-PRC011-EN 35


Table 29. Minimum and maximum airflow per inlet size and kW

I-P SI

Inlet Size kW Min Cfm Max Cfm Min L/s Max L/s

4 1.0 130 225 61 106

5

1.01.52.02.5

125165185205

350350350350

59788797

165165165165

6

1.01.52.02.53.03.54.0

120150180210240270300

500500500500500500500

57718599113127142

236236236236236236236

8

1.0-3.03.54.04.55.05.56.06.57.0

210265315345380420450490525

900900900900900900900900900

99125149163179198212231248

425425425425425425425425425

10

1.0-4.55.05.56.06.57.07.58.09.010.011.0

330370410450495550605660710765820

14001400140014001400140014001400140014001400

156175194212234260286312335361387

660660660660660660660660660660660

12

1.0-6.57.07.58.09.010.011.012.013.014.015.016.0

4705205656157057858609401000105511151175

200020002000200020002000200020002000200020002000

222245267290333371406444472498526555

943943943943943943943943943943943943

14

1.0-9.010.011.012.013.014.015.016.017.018.020.022.0

6407208008809601040112012001280134514751600

300030003000300030003000300030003000300030003000

302340378415453491529566604635696755

141514151415141514151415141514151415141514151415

36 VAV-PRC011-EN


Minimum Circuit Ampacity (MCA) Equation

• MCA = heater amps x 1.25

Maximum Overcurrent Protection (MOP) Equation

• MOP = heater amps

• However since MOP is less than or equal to MCA, then choose next fuse greater than MCA.

• Units without electric reheat would use smallest fuse sizing.

Standard Fuse Sizes: 15, 20, 25, 30, 35, 40, 45, 50, and 60.Example–For MOP of Single-Duct UnitA model VCEF, electric reheat unit size 14 has 480/3 phase 15 kW electric reheat with 2 stages.15 kW – 480/3 heater15x1000/480x1.73=18.06MCA = 18.06 x 1.25 = 22.58 amps. Since MOP is less than or equal to MCA, then MOP = 25.

Useful Formulas

kW = 1214 X L/s X ATDATD = kW / 1214 X L/s

16

1.0-12.013.014.015.016.017.018.020.022.024.026.028.030.0

8409109801050112011901260140015401680182019602100

4000400040004000400040004000400040004000400040004000

396430463496529562595661727793859925991

1886188618861886188618861886188618861886188618861886

24 x 16

1.0-22.024.026.028.030.032.034.036.038.040.042.044.046.0

1600180020002200240026002800300032003400360038004000

8000800080008000800080008000800080008000800080008000

7558509441038113312271322141615101605169917941888

3772377237723772377237723772377237723772377237723772

Note: Minimum and maximum airflow is based on UL listing and certification.

Table 29. Minimum and maximum airflow per inlet size and kW (continued)

kW Cfm ATD3145

--------------------------------=

3amps kW 1000PrimaryVoltage 3------------------------------------------------------------------=

ATD kW 3145Cfm

-------------------------------=

1amps kW 1000PrimaryVoltage----------------------------------------------------=

VAV-PRC011-EN 37


Table 30. Discharge sound power (dB)1, 2, 4Perf

Inlet Size (in)

0.5" Inlet Pressure Ps5





Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7

4

80 38 65 61 46 44 40 37 66 65 53 51 47 46 68 70 61 60 60 56 69 73 67 66 64 61

120 57 68 64 49 48 43 41 72 69 55 53 49 47 72 73 64 60 57 55 73 76 71 68 63 60

150 71 68 64 49 49 45 42 73 70 56 54 51 49 75 74 61 58 55 53 75 76 65 61 58 56 76 76 72 68 64 61

225 106 73 68 54 54 50 49 78 75 61 59 55 54 81 81 68 64 61 59 80 82 73 69 65 63

5

130 61 60 56 45 43 41 38 63 62 52 50 48 47 65 68 61 59 58 55 67 72 69 66 63 60

200 94 63 59 48 47 43 40 67 65 56 53 50 49 70 71 64 61 58 56 69 73 70 67 63 61

250 118 65 61 49 49 44 42 70 67 57 55 52 50 71 70 61 57 55 54 73 73 64 60 58 57 73 75 72 69 63 61

350 165 67 63 54 53 48 47 74 69 59 57 53 53 78 76 67 62 59 58 78 78 73 69 64 63

6

200 94 60 57 46 44 41 38 64 63 55 52 49 47 66 70 64 60 58 55 68 74 72 67 63 60

300 142 64 60 48 48 44 41 67 65 56 53 50 48 71 71 65 61 58 56 72 75 72 69 64 62

400 189 65 60 51 49 44 42 71 67 58 55 51 50 73 71 63 59 56 55 74 73 66 61 58 57 76 76 73 68 63 62

500 236 69 64 55 53 49 47 73 69 61 58 53 53 77 75 69 63 60 59 79 78 73 69 64 63

8

350 165 61 57 48 45 44 40 64 64 54 51 50 53 68 71 62 58 58 60 71 76 71 66 63 61

520 245 63 59 51 48 45 42 66 66 57 53 52 56 71 74 65 61 60 66 73 76 72 66 65 66

700 330 65 60 54 51 48 44 69 67 60 56 53 57 71 71 63 59 58 60 73 74 67 62 61 64 75 77 74 68 66 69

900 425 68 63 57 56 52 49 72 68 62 59 56 57 77 75 69 64 62 65 79 78 74 68 67 68

10

550 260 59 54 53 51 45 40 64 62 58 57 53 48 70 68 65 66 62 58 72 71 70 71 66 62

820 387 62 57 55 51 46 42 67 64 61 60 55 52 72 70 66 66 62 60 75 74 70 70 66 63

1100 519 66 60 58 54 49 46 71 67 64 61 56 53 75 70 67 66 61 57 76 72 68 68 63 60 78 75 73 71 67 64

1400 661 70 63 62 58 53 51 75 68 65 62 57 54 79 74 70 66 63 60 80 77 73 70 67 64

12

800 378 59 54 52 49 47 41 64 61 57 55 55 52 71 69 65 63 63 61 72 71 68 67 67 64

1200 566 61 56 54 50 49 43 67 64 60 57 57 55 73 71 67 63 64 62 77 75 71 68 68 66

1600 755 64 59 58 53 52 46 69 66 62 58 57 56 73 71 66 61 62 60 75 73 69 64 65 63 78 77 73 69 69 66

2000 944 68 62 61 56 56 51 73 69 65 61 60 59 78 75 70 65 65 64 81 77 74 69 69 67

14

1100 519 58 53 51 46 44 39 64 61 57 54 53 51 69 72 66 62 61 59 72 73 71 67 66 63

1600 755 61 56 55 49 46 41 67 62 60 56 54 51 71 71 67 63 62 61 74 76 72 67 67 64

2100 991 64 60 59 52 49 44 69 66 63 57 54 52 72 69 66 61 59 58 73 72 69 64 62 61 76 74 73 68 67 64

3000 1416 70 66 67 57 55 52 75 71 68 61 58 58 80 77 72 66 64 61 81 78 75 70 69 66

16

1400 661 57 53 51 47 46 40 63 61 58 55 55 51 69 72 67 63 63 62 72 76 73 69 67 66

2100 991 60 56 55 51 49 43 66 63 60 57 55 52 71 71 68 64 64 61 73 76 73 70 68 66

2800 1321 64 61 61 54 51 48 69 66 64 58 57 54 72 69 67 62 61 60 72 72 70 65 64 63 75 74 73 70 69 65

4000 1888 71 68 68 63 57 54 74 71 70 63 61 59 78 76 73 68 65 64 80 77 76 72 70 67

24 x16

2700 1274 71 68 61 58 54 50 75 72 67 65 62 58 77 76 73 71 68 65 78 78 76 75 72 69

4000 1888 73 71 65 62 58 54 77 76 71 68 65 61 81 80 77 75 72 68 82 82 80 78 76 72

5300 2501 72 71 67 64 61 58 78 77 75 71 67 63 80 80 78 75 71 68 81 83 81 78 74 70 84 85 84 81 78 74

6000 2832 71 71 68 65 62 60 78 77 76 72 68 65 82 83 83 79 75 71 84 86 86 82 79 75

7500 3540 70 71 70 67 63 63 79 77 77 73 70 68 83 84 88 81 76 73 85 87 90 84 80 76

8000 3776 70 71 71 68 64 64 79 77 78 74 71 69 83 84 89 82 77 74 85 87 91 85 81 77

Notes:

1. All data are measured in accordance with Industry Standard ARI 880-2011. 2. All sound power levels, dB re: 10-12 Watts. 3. Data in this column constitute AHRI 880-2011 Standard Rating Conditions 4. Where Ps is the inlet static pressure minus discharge static. 5. Application ratings are outside the scope of the certification program.

38 VAV-PRC011-EN


Table 31. Radiated sound power (dB)1, 2, 4

Inlet Size (in)






Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7

4

80 38 48 45 40 33 31 23 48 47 43 37 34 25 48 51 53 47 43 35 46 52 60 54 48 42

120 57 47 45 40 33 30 23 49 48 45 38 34 27 50 51 54 46 42 36 51 54 60 52 47 42

150 71 47 45 41 35 30 24 51 49 46 39 35 28 52 52 50 43 39 33 52 53 55 47 43 37 51 56 61 53 48 42

225 106 52 49 44 40 35 30 57 54 49 43 39 33 60 59 57 48 45 39 59 61 63 54 49 44

5

130 61 47 44 35 29 24 21 48 45 41 35 30 25 48 48 50 45 39 33 48 51 58 51 45 40

200 94 48 45 38 32 25 22 49 47 43 37 32 26 50 52 52 45 39 35 50 55 58 51 45 40

250 118 48 44 40 34 27 23 50 48 45 38 33 27 52 50 49 42 37 31 52 53 53 44 40 35 53 56 60 52 44 40

350 165 51 47 44 38 31 26 55 51 47 41 35 31 59 56 55 47 41 37 56 58 60 51 44 40

6

200 94 52 46 38 31 25 22 50 47 43 36 31 26 52 51 52 43 38 33 51 55 59 50 44 40

300 142 52 48 41 33 25 22 55 50 46 38 32 27 56 53 53 44 38 35 57 57 60 50 44 39

400 189 55 49 44 36 28 24 56 53 48 40 33 28 58 54 51 43 37 32 59 56 55 46 40 35 59 58 60 50 43 40

500 236 55 49 47 40 32 27 59 54 51 43 36 31 62 59 57 47 41 36 63 60 61 52 44 40

8

350 165 46 42 38 31 27 22 48 45 43 36 35 27 54 52 53 42 41 36 56 58 64 52 46 42

520 245 49 43 41 35 31 24 51 48 47 39 37 29 55 54 54 45 43 38 56 57 63 51 47 44

700 330 50 46 44 38 34 26 54 51 50 42 38 34 57 54 53 45 42 36 58 57 57 48 45 39 60 59 62 52 48 44

900 425 56 49 50 44 37 29 59 53 53 46 41 35 62 59 57 49 46 39 63 61 62 53 49 44

10

550 260 48 44 42 32 25 24 52 49 48 40 31 26 55 55 53 47 39 32 58 58 59 50 44 38

820 387 53 47 43 36 28 25 57 52 49 41 33 27 60 58 55 48 40 33 62 61 60 52 44 38

1100 519 58 50 46 39 30 27 61 55 51 43 35 29 63 59 54 47 39 32 64 61 57 50 42 35 67 63 61 53 45 39

1400 661 62 53 49 42 34 30 66 58 54 46 38 33 69 63 58 51 43 37 71 65 63 55 46 41

12

800 378 49 46 40 33 27 27 54 51 46 39 34 29 58 58 53 46 42 35 59 62 59 51 47 40

1200 566 54 48 43 35 29 27 59 54 48 41 35 30 64 61 55 48 43 37 66 64 60 52 47 42

1600 755 60 53 47 38 32 30 63 58 50 42 37 32 66 62 54 46 40 36 68 64 57 49 43 39 71 66 61 53 48 43

2000 944 63 58 52 42 37 34 67 62 54 45 40 38 72 68 58 50 45 42 75 68 61 54 50 45

14

1100 519 47 46 36 30 24 23 53 53 42 36 32 27 57 61 52 43 40 35 60 64 60 48 43 38

1600 755 52 49 39 32 24 23 56 54 45 38 32 26 60 63 52 44 39 35 63 67 60 49 43 40

2100 991 55 52 43 35 27 25 59 57 48 40 33 28 61 61 51 43 37 32 63 64 55 46 40 36 65 67 61 50 44 40

3000 1416 63 59 51 42 34 31 65 64 54 44 36 34 68 68 57 48 41 37 69 69 60 52 45 41

16

1400 661 50 47 38 32 26 23 54 54 45 40 35 29 60 62 53 47 43 38 63 66 61 52 47 43

2100 991 51 49 41 35 28 24 56 54 47 41 36 30 61 61 55 49 44 39 64 66 60 53 48 43

2800 1321 56 54 45 38 31 27 59 56 49 43 37 32 60 60 53 46 41 36 62 62 56 49 44 39 65 65 61 54 49 44

4000 1888 61 60 55 45 38 32 63 63 56 47 41 36 67 66 59 51 46 41 69 66 62 55 50 45

24x16

2700 1274 65 63 53 45 38 30 70 65 60 52 45 37 71 69 66 59 51 45 72 71 69 62 54 50

4000 1888 67 67 57 48 40 32 71 71 64 55 48 41 74 75 69 61 54 48 76 77 72 65 58 52

5300 2501 67 66 58 49 42 35 74 75 69 57 49 42 75 76 72 61 53 46 76 77 74 64 56 50 78 79 76 67 60 53

6000 2832 68 66 59 51 44 37 74 75 69 58 50 43 77 78 75 65 57 51 79 80 77 68 61 54

7500 3540 69 67 61 54 48 42 75 74 70 59 51 45 78 80 78 66 58 52 80 81 79 69 62 55

8000 3776 69 67 62 55 49 44 75 74 70 59 52 46 79 81 79 67 59 52 80 82 80 70 63 56

Notes:

1. All data are measured in accordance with Industry Standard AHRI 880-2011. 2. All sound power levels, dB re: 10-12 Watts. 3. Data in this column constitute AHRI 880-2011 Standard Rating Conditions 4. Where Ps is the inlet static pressure minus discharge static. 5. Application ratings are outside the scope of the certification program.

VAV-PRC011-EN 39


Table 32. Sound noise criteria (NC)

Discharge1,2,4 Radiated1,2,4

Inlet Size (in)

Inlet Pressure (Ps)3,5 Inlet Pressure (Ps)3,5

CFM l/s 0.5” 1.0” 1.5” 2.0” 3.0” 0.5” 1.0” 1.5” 2.0” 3.0”

4

80 38 21 25 31 34 -- 16 27 35

120 57 25 30 34 38 -- 19 28 35

150 71 25 32 35 38 38 -- 20 24 30 36

225 106 32 38 44 45 18 23 32 38

5

130 61 -- 21 28 33 -- -- 24 33

200 94 19 25 32 34 -- 16 26 33

250 118 21 28 31 34 37 -- 19 23 27 35

350 165 24 33 38 40 18 21 30 35

6

200 94 -- 21 29 34 -- 16 26 34

200 142 18 23 31 35 15 20 27 35

400 189 18 26 31 33 37 18 22 25 30 35

500 236 23 28 35 39 21 25 32 36

8

350 165 -- 23 31 37 -- 16 27 39

520 245 17 25 34 37 -- 21 28 38

700 330 18 26 31 34 38 18 24 27 32 37

900 425 21 27 36 39 24 27 32 37

10

550 260 -- 19 26 30 15 22 27 34

820 387 -- 22 29 33 16 23 30 35

1100 519 17 25 29 31 35 20 25 28 32 36

1400 661 21 27 33 37 25 30 34 38

12

800 378 -- 17 27 29 -- 20 27 34

1200 566 -- 21 29 34 16 23 31 35

1600 755 15 23 29 32 36 22 27 32 34 37

2000 944 19 27 34 36 27 32 39 42

14

1100 519 -- 18 31 32 -- 21 31 35

1600 755 -- 19 30 36 17 23 33 38

2100 991 17 24 28 31 33 20 26 31 34 38

3000 1416 24 30 37 38 28 34 39 40

16

1400 661 -- 18 31 36 -- 23 32 37

2100 991 -- 20 30 36 17 23 31 37

2800 1321 18 24 27 31 33 23 25 30 32 36

4000 1888 26 30 36 37 30 33 37 37

24 x 16

2700 1274 26 31 35 38 33 36 41 45

4000 1888 30 35 40 43 38 43 47 50

5300 2501 30 37 40 44 46 37 47 49 50 52

6000 2832 30 37 44 47 37 47 51 53

7500 3540 30 37 45 49 38 46 55 56

8000 3776 30 37 45 49 38 46 56 57

Notes:

1. "--" represents NC levels below NC 15. 2. NC Values are calculated using modeling assumptions based on AHRI 885-2008-02 Addendum. 3. Data at 1.5" inlet pressure constitute AHRI 880-2011 Standard Rating Conditions 4. Where Ps is the inlet static pressure minus discharge static. 5. Data at 0.5", 1.0", 2.0"& 3.0" are application ratings, these ratings are outside the scope of the certification program.

40 VAV-PRC011-EN


Table 33. AHRI 885-2008 discharge transfer function assumptions

Octave Band2 3 4 5 6 7

Small Box (< 300 cfm)Medium Box (300-700 cfm)Large Box (> 700 cfm)

-24-27-29

-28-29-30

-39-40-41

-53-51-51

-59-53-52

-40-39-39

Notes: Add to terminal unit sound power to determine discharge sound pressure in the space. 1. “—” represents NC levels below NC 15. 2. NC Values are calculated using current Industry Standard AHRI 885-2008. Radiated Transfer Function obtained from Appendix E, Type 2 Mineral Fiber

Insulation. 3. Where Ps is inlet static pressure minus discharge static pressure. 4. Application ratings are outside the scope of the Certification Program.

Table 34. AHRI 885-2008 radiated transfer function assumptions

Octave Band

2 3 4 5 6 7

Type - Mineral Fiber -18 -19 -20 -26 -31 -36

Notes: Select the ceiling type which most closely represents the application. Next, add to terminal unit sound power to determine radiated sound pressure in the space.

1. “—” represents NC levels below NC 15. 2. NC Values are calculated using current Industry Standard AHRI 885-2008. Radiated Transfer Function obtained from Appendix E, Type 2 Mineral Fiber

Insulation. 3. Where Ps is inlet static pressure minus discharge static pressure. 4. Application ratings are outside the scope of the Certification Program.

VAV-PRC011-EN 41


Dimensional Data

NOTES:

1. Air inlet centered in unit front panel.

2. Outlet combinations to remote diffusers have optional integral balancing dampers. (See specification sheet.)

3. Outlet connections are centered in plenum panel.

4. Plenum not available with size 14 & 16 units.

5. Minimum of 1.5 duct diamenters of straight duct required at inlet for proper flow reading.

6. Allow 36" (914 mm) on control side for servicing.

7. Weights are an estimation and will vary based on selected options, insulation type, etc.

8. Unit is field convertible from a left-hand connection (shown) to right-hand by rotating unit.

A B C D FE H J

OUTLET PLENUMARRANGEMENTS

(TOP VIEW)

11.50" [292mm]

13.50" [343mm]

15.50" [394mm]

9.50" [241mm]

L/sCFM

225

350

500

900

1400

2000

08

12

10

06

05

04

VALV

425

661

994

106

165

236

13.00" [330mm]

12.00" [305mm]11.00" [279mm]

11.50" [292mm]

INLET SIZE(NOMINAL Ø)

8" [203mm]

10" [254mm]

12" [305mm]

4" [104mm]

5" [127mm]

6" [152mm]

CL H

14.00" [356mm]

E

11.50" [292mm]

14.00" [356mm]15.50" [394mm]

W

12.50" [318mm]

18.50" [470mm]

11.50" [292mm]

38 [17]30 [14]

22 [10]

LBS

21 [9.5]

WT

SYMBOL NOMINALØ

IVIII

III

10" [254mm]8" [203mm]

6" [152mm]5" [127mm]


D,E,F

JH

A,B,C


OUTL

VALV

I, II, IIIN/A

I, II, III

N/AN/AI, III, III, II4

I, III, III, II

5

N/A

I, III, III, II

6III8

III, IVIII, IV

12

I I, IIII, III, IVII, III, IV

10III, IV IV

20.50" [521mm]14" [356mm]14 3000 1416 14.00" [356mm] 19.50" [495mm] NA 46 [21]24.50" [622mm]16" [406mm]16 4000 1888 15.00" [381mm] NA 51 [23]

28.50" [724mm]16X24"

24RT 8000 3776 18.00" [457mm] NA 70 [32] [406mm x 610MM]

[KGS]

4.25" [108mm]

2.75" [70mm]

3.25" [83mm]

2.25" [57mm]

Z

2.75" [70mm]

2.25" [57mm]

A (h) B (w)

10.00" [254mm]

12.00" [305mm]

14.00" [356mm]

18.00" [457mm]

8.00" [203mm]

19.00" [483mm]

17.00" [432mm]

14.00" [356mm]

11.00" [279mm]

10.00" [250mm]

23.00" [584mm]

27.00" [686mm]

SINGLE-DUCT COOLING ONLY WITH OPTIONAL OUTLET PLENUM (VCCF)

42 VAV-PRC011-EN


VAV-PRC011-EN 43


SINGLE DUCT HOT WATER W/PLENUM (VCWF)

CONTROL BOX(PNEU. CONTROLS AREA)

SLIP & DRIVECONNECTION

COIL ACCESS76mm x 178mm[3.00" x 7.00"]

C

L

H

W

SIZE 04 & 055.75" [146mm]

4.00"[102 mm]

14.60"[371 mm]

5.50"[140 mm]

9.50"[241 mm]

BACK VIEW

TOP VIEW

04,05,06 - 7.70" [196 mm]ALL OTHERS - 7.40" [188 mm]

E

AIR FLOW


A,B,C

HOUTL

J

VALV

D,E,F

N/A N/A N/A

IIII, II4 5

III, IV6

IV8 10 12

I, II I, III, II I, II I, II I, II, III II, III, IV III, IVI, II I, II I, II

IN/A I, III, II, III II, III, IV III, IV

4. Plenum not available w/sizes 14 & 16 units.


optional integral balancing dampers (See

7. Weights are an estimation and will varybased on selected options, insulation type, etc.

6. Allow 36" [914mm] on control side for servicing.

5. Minimum of 1.5 duct diameters of straight

2. Outlet combinations to remote diffusers have

1. Air inlet is centered in unit front panel.

specification sheet.)

duct required for proper flow reading.

CUSTOMER NOTES:

(TOP VIEW)ARRANGEMENTS

A B C D

OUTLET PLENUM

HFE Jhandedness of coil connection is determined

8. Coil furnished with stub sweat connections.

by facing air stream.

FLOW RINGTUBING

Z

DISCHARGEDIMENSIONS(BxA)

ARRANGEMENT "H"1.50" (38 mm) FLANGE

2.75" [70mm]

2.25" [57mm]

2.75" [70mm]

3.25" [83mm]

4.25" [108mm]

2.25" [57mm]

6" [152mm]23650006

16" [406mm]

14" [356mm]

12" [305mm]

10" [254mm]

8" [203mm]08

12

10

14

16

24RT

1888

1416

3776

3000

4000

8000

900

1400

2000

661

994

425

16X24"

11.50" [292mm]

13.50" [343mm]

15.50" [394mm]

19.50" [495mm]

11.00" [279mm]12.00" [305mm]

13.00" [330mm]

14.00" [356mm]

15.00" [381mm]

18.00" [457mm]

15.50" [394mm]12.50" [318mm]

18.50" [470mm]

20.50" [521mm]

24.50" [622mm]

28.50" [724mm]

INLET SIZE(NOMINAL Ø)

5" [127mm]

4" [104mm]

05

04

VALV L/sCFM

225

350 165

106C

9.50" [241mm]11.50" [292mm]

L

11.50" [292mm]

H W

27.00" [686mm]

23.00" [584mm]

19.00" [483mm]

17.00" [432mm]

14.00" [356mm]

11.00" [279mm]

18.00" [457mm]

14.00" [356mm]

12.00" [305mm]

10.00" [254mm]

14.00" [356mm]14.00" [356mm]

NA

NA

NA 71 [32]

95 [43]

62 [28]

40 [18]51 [23]

30 [14]

10.00" [254mm]8.00" [203mm]

A (h)Z

11.50" [292mm]

B (w) E LBS

27 [12][KGS]

WT

NOMINALØ

8" [203mm]

6" [152mm]5" [127mm]


10" [254mm]IV

SYMBOLI

IIIII

humidity, external insulation around the heatingthe unit is to be installed in a location with high

9. Coils are provided without internal insulation. If

coil should be installed as required.

(shown) to right-hand by rotating unit.10. Unit is field convertible from a left-hand connection

11. Add 1.75" for 3 or 4 row coils. 1 or 2 row shown.

44 VAV-PRC011-EN


VAV-PRC011-EN 45


46 VAV-PRC011-EN


[25mm]

3[79mm]

OUTLET

64/7 "

1

AIR FLOWB [198mm]

7 32/ "

INLET

A

[86mm]3

[29mm]1 64

9 / "

"

C

AIR FLOW

W

[25mm]1 "

AB

INLET

OUTLET

3[79mm]

64/7 "[86mm]

32133 / "

[198mm]

137 32/ "

AIR FLOW

[29mm]1 64

9 / "

Acce

ssPa

nel

Acce

ssPa

nel

W

13

32/ "13

stream. L.H. Coil connections shown, R.H. opposite.Location of coil connections is determined by facing air1.

CUSTOMER NOTES:


08101214

INLT

040506

COIL INFORMATION FOR 2 ROW COIL ASSY

CONNECTION

7/ 8 " [22mm] O.D.

7/ 8 " [22mm] O.D.

B CA

1400 661

30002000 994

1416

SECOND

LITERS

900

350500

225

per

165

425236

CFM

106 [206mm]/8 "81

3.

Coil height and width is dependent upon unit height4.and width.

Access Panel is standard.5.

1616 x 24

40008000

18883776 [22mm] O.D.

[22mm] O.D.7/ 8

/78

""

COIL

[206mm]88 1/ "

[206mm]88 1/ "[257mm]810 /1 "

[308mm]812 1/ "[359mm]814 /1 "[460mm]818 /1 "[460mm]818 /1 "[460mm]/ 818 1 "

10" [254mm]

10" [254mm]10" [254mm]11" [279mm]14" [356mm]17" [432mm]19" [483mm]

23" [584mm]27" [686mm]

[22mm] O.D.[22mm] O.D./7

8

/78

""

[413mm][311mm][260mm]

[210mm]

[191mm]

10

1612

8/ 4

1/ 4

/14

""

1/1

4 "

"

6 "

[191mm]"6[191mm]"6

[413mm]"116 / 4

[413mm]"116 / 4

W[210mm]8 /1

4 "

8 1/ 4 [210mm]"

8 1/ 4 [210mm]"

4/1

4/1

4/1

8

8 1

181

[210mm]

[210mm]

[210mm]

4/

4/ "

"/ 4

"

8

8 1

181

[210mm]

[210mm]

[210mm]

4/

4/ "

"/ 4

"

7

7

7

[22mm] O.D.[22mm] O.D.

[22mm] O.D.8/

8/ "

"/ 8

"

coil. Water outlet always on airflow upstream side of hotWater inlet always on airflow downstream side of hot waterFor 2-row coils, always plumb in counter flow orientation:Use port at bottom for inlet and port at top for outlet.

water coil. See drawings below for reference.

LEFT HAND RIGHT HAND

VAV-PRC011-EN 47


C

10"

[254mm]

13 / "[86mm]3 32

AIR FLOW/7 13

32

[198mm]"

Access

Panel

[72mm]

27

OUTLET

2 32/ "

A

INLET

D

INLET

B/7 13

32[198mm]

"

AAcce

ssPanel

13/ "[86mm]3 32

[72mm]

272 32/ "

OUTLET

AIR FLOW

10"

[254mm]

B

AIR FLOW


CUSTOMER NOTES:


3.



For 3-row coils, always plumb in counter flow orientation:Coil is rotated to achieve opposite connection.

coil. Water outlet always on airflow upstream side of hotWater inlet always on airflow downstream side of hot water


[206mm]

[206mm]

[206mm]

[257mm]

[308mm]

[359mm]

[460mm]

[460mm]

[460mm]


16 x 24

16 4000

8000

05 350

10

12

14

08

06

1400

3000

2000

900

500

04

INLT CFM

225

8/[400mm]4/

15

151888

3776 [400mm]

[400mm]"

"3 4

/3 4118

18 1

8/ "

8/ "

5

11

15

9

CONNECTION

[22mm] O.D.

165

661

994

1416

425

236

SECOND

106

LITERSper

7 "8

5

7

5

COIL

[146mm]4/

[298mm]

[248mm]

[196mm]

[146mm]

3 "

"

"

/ 43

3

/ 4

"

/ 4

/3 4

3 "

[146mm]3/3

4 "

"

A

8 8/

1

114

18 1

12

8/

"

8/ "

"

10 1

18 /

8/ "

8 "

1

18 "/ 8

"

B

19" [483mm]

27" [686mm]

23" [584mm]

10" [254mm]

10" [254mm]

10" [254mm]

11" [279mm]

14" [356mm]

17" [432mm]

C

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/ /

D

53 [92mm]"8/

[92mm]5/3 8 "

[92mm]5/3 8 "

[92mm]5/3 8 "

[92mm]5/3 8 "

[92mm]5/3 8 "

[92mm]5/3 8 "

[92mm]5/3 8 "

[92mm]5/3 8 "


48 VAV-PRC011-EN


AIR FLOW

C

AIR FLOW

D

10"[254mm]

AIR FLOW B

/ 32

[198mm]7 13 "

Access

Panel

[86mm]3 "32/13

[94mm]32"

OUTLET

233 /

A

INLET

[94mm]32"

233 /

B/ 32

[198mm]7 13 "

Access

Panel

[86mm]

3 "32/13

A

INLET

OUTLET

10"[254mm]


CUSTOMER NOTES:




[206mm]

[206mm]

[206mm]

[257mm]

[308mm]

[359mm]

[460mm]

[460mm]

[460mm]


16 x 24

16 4000

8000

05 350

10

12

14

08

06

1400

3000

2000

900

500

04

INLT CFM

225

8/[413mm]4/

16

161888

3776 [413mm]

[413mm]"

"1 4

/1 4118

18 1

8/ "

8/ "

6

12

16

10

CONNECTION

[22mm] O.D.

165

661

994

1416

425

236

SECOND

106

LITERSper

7 "8

6

8

6

COIL

[158mm]4/

[311mm]

[260mm]

[210mm]

[158mm]

1 "

"

"

/ 41

1

/ 4

"

/ 4

/1 4

1 "

[158mm]1/1

4 "

"

A

8 8/

1

114

18 1

12

8/

"

8/ "

"

10 1

18 /

8/ "

8 "

1

18 "/ 8

"

B

19" [483mm]

27" [686mm]

23" [584mm]

10" [254mm]

10" [254mm]

10" [254mm]

11" [279mm]

14" [356mm]

17" [432mm]

C

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

[22mm] O.D.7 8 "

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/ / "83 /5 [92mm]

"83 /5 [92mm]

"83 /5 [92mm]

"83 /5 [92mm]

"83 /5 [92mm]

"83 /5 [92mm]

"83 /5 [92mm]

"83 /5 [92mm]

/ 8 " [92mm]3 5

D

3.For 4-row coils, always plumb in counter flow orientation:Coil is rotated to achieve opposite connection.

coil. Water outlet always on airflow upstream side of hotWater inlet always on airflow downstream side of hot water



VAV-PRC011-EN 49


LEFT-HAND

50 VAV-PRC011-EN


VAV-PRC011-EN 51


Mechanical Specifications

(MODELS VCCF, VCWF and VCEF)

Single-DuctTerminal Units

CASING

22-gage galvanized steel.

AGENCY LISTING

Unit is UL and Canadian UL Listed as a room air terminal unit. Control # 9N65. AHRI 880 Certified.

INSULATION

1/2" (12.7 mm) Matte-faced Insulation—Interior surface of unit casing is acoustically andthermally lined with ½-inch, 1.5 lb/ft3 (12.7 mm, 24.0 kg/m3) composite density glass fiber with ahigh-density facing. Insulation R-Value is 1.9. Insulation is UL listed and meets NFPA-90A and UL181 standards.There are no exposed edges of insulation (complete metal encapsulation).

1" (25.4 mm) Matte-faced Insulation—Interior surface of unit casing is acoustically andthermally lined with 1-inch, 1.0 lb/ft3 (25.4 mm, 16.0 kg/m3) composite density glass fiber with ahigh-density facing. Insulation R-Value is 3.85. Insulation is UL listed and meets NFPA-90A and UL181 standards.There are no exposed edges of insulation (complete metal encapsulation).

1" (25.4 mm) Foil-faced Insulation— Interior surface of unit casing is acoustically and thermallylined with 1-inch, 1.5 lb/ft3 (25.4 mm, 24.0 kg/m3) density glass fiber with foil facing. Insulation R-Value is 4.1. Insulation is UL listed and meets NFPA-90A and UL 181 standards and bacteriologicalstandard ASTM C 665.There are no exposed edges of insulation (complete metal encapsulation).

1" (25.4 mm) Double-wall Insulation—Interior surface of unit casing is acoustically andthermally lined with a 1-inch, 1.0 lb./ft3 (25.4 mm, 16.0 kg/m3) composite density glass fiber withhigh-density facing. Insulation R-value is 3.8. Insulation is UL listed and meets NFPA-90A and UL181 standards. Insulation is covered by interior liner made of 26-gage galvanized steel. All wirepenetrations are covered by grommets.There are no exposed edges of insulation (complete metalencapsulation).

3/8" (9.5 mm) Closed-cell Insulation—Interior surface of the unit casing is acoustically andthermally lined with 3/8-inch, 4.4 lb/ft3 (9.5 mm, 70.0 kg/m3) closed-cell insulation. Insulation is ULlisted and meets NFPA-90A and UL 181 standards. Insulation has an R-Value of 1.4.There are noexposed edges of insulation (complete metal encapsulation).

PRIMARY AIR VALVE

Air Valve Round—The primary air inlet connection is an 18-gage galvanized steel cylinder sizedto fit standard round duct.A multiple-point, averaging flow sensing ring is provided with balancingtaps for measuring +/-5% of unit cataloged airflow. An airflow-versus-pressure differentialcalibration chart is provided.The damper blade is constructed of a closed-cell foam seal that ismechanically locked between two 22-gage galvanized steel disks.The damper blade assembly isconnected to a cast zinc shaft supported by self-lubricating bearings.The shaft is cast with adamper position indicator.The valve assembly includes a mechanical stop to prevent over-stroking. At 4.0 in. wg, air valve leakage does not exceed 1% of cataloged airflow.

AirValve Rectangular—Inlet collar is constructed of 22-gage galvanized steel sized to fit standardrectangular duct. An integral multiple-point, averaging flow-sensing ring provides primary airflowmeasurement within +/-5% of unit cataloged airflow. Damper is 22-gage galvanized steel.Thedamper blade assembly is connected to a cast zinc shaft supported by self-lubricating bearings.The shaft is cast with a damper position indicator.The valve assembly includes a mechanical stopto prevent over-stroking. At 3.0 in. wg air valve leakage does not exceed 6% of maximum airflow.

VCCF - Cooling Only VCWF - With Hot Water Coil VCEF - With Electric Coil

52 VAV-PRC011-EN


OUTLET CONNECTION

Slip & Drive Connection—Terminal units come standard with slip & drive connection.

Outlet Plenum—A sheet metal, insulated box with circular opening(s) is attached to main unitdischarge at the factory. Circular opening(s) are centered on unit plenum to accept round ductworkconnections.

Outlet Plenum with Balancing Dampers—A sheet metal, insulated box with circularopening(s) is factory- connected to the main unit.The circular opening(s) with balancing damper(s)are centered on the unit plenum to accept round ductwork connections.

HOT WATER COILS

1-Row Hot Water Coils—The 1-row hot water reheat coil is factory-installed on the dischargeoutlet.The coil has 144 aluminum fins per foot. Full fin collars provided for accurate fin spacing andmaximum fin-tube contact.The 3/8" (9.5 mm) OD seamless copper tubes are mechanicallyexpanded into the fin collars. Coils are proof tested at 450 psig (3102 kPa) and leak tested at 300psig (2068 kPa) air pressure under water. Coil connections are left-hand. Right-hand connectionsare optional. Coils are assembled with either 3/8" or 7/8" (22.2 mm) OD braze connections.

2-Row Hot Water Coils—The 2-row hot water reheat coil is factory-installed on the dischargeoutlet.The coil has 144 aluminum per foot. Full fin collars provided for accurate fin spacing andmaximum fin-tube contact.The 3/8" (9.5 mm) OD seamless copper tubes are mechanicallyexpanded into the fin collars. Coils are proof tested at 450 psig (3102 kPa) and leak tested at 300psig (2068 kPa) air pressure under water. Coils are assembled with headers that provide 7/8" (22.2mm) OD braze connections. Right-hand connections are optional.

3-Row Hot Water Coils—The 3-row hot water reheat coil is factory-installed on the dischargeoutlet. The coil has 120 aluminum fins per foot. Full fin collars provided for accurate fin spacingand maximum fin-tube contact. The 3/8" (9.5 mm) OD seamless copper tubes are mechanicallyexpanded into the fin collars. Coils are proof tested at 450 psig (3102 kPa) and leak tested at 300psig (2068 kPa) air pressure under water. Coils are assembled with headers that provide 7/8" (22.2mm) OD braze connections. Right-hand connections are optional.

4-Row Hot Water Coils—The 4-row hot water reheat coil is factory-installed on the dischargeoutlet. The coil has 120 aluminum fins per foot. Full fin collars provided for accurate fin spacingand maximum fin-tube contact. The 3/8" (9.5 mm) OD seamless copper tubes are mechanicallyexpanded into the fin collars. Coils are proof tested at 450 psig (3102 kPa) and leak tested at 300psig (2068 kPa) air pressure under water. Coils are assembled with headers that provide 7/8" (22.2mm) OD braze connections. Right-hand connections are optional.

ELECTRIC HEAT COIL

The electric heater is a factory-provided and -installed, UL recognized resistance open-type heaterwith airflow switch. It also contains a disc-type automatic pilot duty thermal primary cutout, andmanual reset load carrying thermal secondary device. Heater element material is nickel-chromium.The heater terminal box is provided with 7/8" (22 mm) knockouts for customer power supply.Terminal connections are plated steel with ceramic insulators.

ELECTRIC HEAT OPTIONS

Silicon-Controlled Rectifier (SCR)—Optional electric heat control that provides modulation.

Electric HeatTransformer—Optional transformer is an integral component of heater controlpanel (dependent on unit load requirements) to provide 24 VAC for controls.There is 19 VAavailable for controls.

Magnetic Contactor—Optional electric heater 24V contactor for use with direct digital controls.

Mercury Contactor—Optional electric heater 24V contactor for use with direct digital controls.

P.E. Switch with Magnetic Contactor—This optional switch and magnetic contactor is for usewith pneumatic controls.

VAV-PRC011-EN 53


P.E. Switch with Mercury Contactor—This optional switch and mercury contactor is for usewith pneumatic controls.

Airflow Switch— An air pressure device designed to disable the heater when the system fan isoff.This is standard on single-duct units.

Line Fuse—An optional safety fuse located in the line of power of the electric heater to preventpower surge damage to the electric heater.

Disconnect Switch—A optional factory-provided door interlocking disconnect switch on theheater control panel disengages primary voltage to the terminal.

UNIT CONTROLS SEQUENCE OF OPERATION

Unit controller continuously monitors zone temperature against its setpoint and varies primaryairflow as required to meet zone setpoints. Airflow is limited by minimum and maximum positionsetpoints. Upon further call for heat after air valve is at minimum, any hot water or electric heatassociated with the unit is enabled.

DIRECT DIGITAL CONTROLS

DDC Actuator—Trane 3-wire, 24-VAC, floating-point quarter turn control actuator with linkagerelease button. Actuator has a constant drive rate independent of load, a rated torque of 35 in-lb,a 90-second drive time, and is non-spring return.Travel is terminated by end stops at fully-openedand -closed positions. An integral magnetic clutch eliminates motor stall.

DDCActuator - Belimo — LMB24-3-TTN 3-wire, 24VAC/DC, floating-point, quarter turn actuatorwith linkage release button. Actuator has constant drive rate independent of load, rated torque 45in-lb, 95 sec drive time, and non-spring return.Travel terminated by end stops at fully-opened and-closed positions. Internal electronic control prevents motor stall when motor reaches end stops.

Direct Digital Controller—Microprocessor based terminal unit controller provides accurate,pressure-independent control through the use of a proportional integral control algorithm anddirect digital control technology.The controller, named Unit Control Module (UCM), monitors zonetemperature setpoints, zone temperature and its rate of change, and valve airflow using adifferential pressure signal from the pressure transducer. Additionally, the controller can monitoreither supply duct air temperature or CO2 concentration via appropriate sensors. Controllerenclosure has 7/8"(22 mm) knockouts for remote control wiring.Trane DDC zone sensor is required.

DDC Zone Sensor—The UCM controller senses zone temperature through a sensing elementlocated in the zone sensor. In addition to the sensing element, zone sensor options may include anexternally-adjustable setpoint, communications jack for use with a portable edit device, and anoverride button to change the individual controller from unoccupied to occupied mode.Theoverride button has a cancel feature that will return the system to unoccupied.Wired zone sensorsutilize a thermistor to vary the voltage output in response to changes in the zone temperature.Wiring to the UCM controller must be 18- to 22-awg. twisted pair wiring.The setpoint adjustmentrange is 50–88ºF (10–31°C). Depending upon the features available in the model of sensor selected,the zone sensor may require from a 2-wire to a 5-wire connection.Wireless zone sensors report thesame zone information as wired zone sensors, but do so using radio transmitter technology.Therefore with wireless, wiring from the zone sensor to the UCM is unnecessary.

Digital Display Zone Sensor with Liquid Crystal Display (LCD)—Digital display zone sensorcontains a sensing element, which signals the UCM. A Liquid Crystal Display (LCD) displayssetpoint or space temperature. Sensor buttons allow user to adjust setpoints, and allow spacetemperature readings to be turned on or off. Digital display zone sensor also includes acommunication jack for use with a portable edit device, and an override button to change UCM fromunoccupied to occupied. Override button cancel feature returns system to unoccupied mode.

System Communications—The Controller is designed to send and receive data from aTracer™SC or otherTrane controllers. Current unit status conditions and setpoints may bemonitored and/or edited via this data communication feature.The network type is a twisted wirepair shielded serial communication.

54 VAV-PRC011-EN


PNEUMATIC CONTROLS

Normally Open Actuator—Pneumatic 3-8 psig (20-55 kPa) spring-range pneumatic actuator.

Normally-Closed Actuator—Pneumatic 8 -13 psig (55-90 kPa) spring-range pneumatic actuator.

3011 Pneumatic Volume Regulator (PVR)—The regulator is a thermostat reset velocitycontroller, which provides consistent air delivery within 5% of cataloged flow down to 18% or lessof unit cataloged cfm, independent of changes in system static pressure. Factory-calibrated, field-adjustable setpoints for minimum and maximum flows. Average total unit bleed rate, excludingthermostat, is 28.8 scim at 20 psig (7.87 ml/min at 138 kPa) supply.

CONTROL OPTIONS

Transformer (VCCF, VCWF)—A 50-VA transformer is factory-installed in an enclosure with 7/8”(22 mm) knockouts to provide 24 VAC for controls.

Disconnect Switch (VCCF,VCWF)—A toggle disconnect disengages primary power to terminal.

Fuse (VCCF, VCWF)—Optional fuse is factory-installed in the primary voltage hot leg.

HOT WATER VALVES

Two-PositionValve—The valve is a field-adaptable, 2-way or 3-way configuration and ships witha cap to be field-installed when configured as a 2-way valve. All connections are National PipeThread (NPT). valve body is forged brass with stainless steel stem and spring. Upon demand, themotor strokes the valve. When actuator drive stops, a spring returns valve to its fail-safe position.

Flow Capacity – 4.00 CvOverall Diameter – ½" NPTClose-off Pressure – 25 psi (172 kPa)

Flow Capacity – 5.0 CvOverall Diameter – 3/4" NPTClose-off Pressure – 20 psi (138 kPa)

Flow Capacity – 8.0 CvOverall Diameter – 1" NPTClose-off Pressure – 17 psi (117 kPa)

Maximum Operating FluidTemperature – 200ºF (93ºC)Maximum system pressure – 300 psi (2067 kPa)Electrical Rating – 7 VA at 24 VAC, 6.5 Watts, 50/60 Hz

Proportional Water Valve—The valve is a field-adaptable, 2-way or 3-way configuration andships with a cap over the bottom port.This configures the valve for 2-way operation. For 3-wayoperation, remove the cap.The valve is designed with an equal percentage plug.The intended fluidis water or water and glycol (50% maximum glycol).The actuator is a synchronous motor drive.The valve is driven to a predetermined position by the UCM controller using a proportional plusintegral control algorithm. If power is removed, the valve stays in its last position.The actuator israted for plenum applications under UL 94-5V and UL 873 standards.

Pressure andTemperature Ratings –The valve is designed and tested in full compliance with ANSIB16.15 Class 250 pressure/temperature ratings, ANSI B16.104 Class IV control shutoff leakage, andISA S75.11 flow characteristic standards.Flow Capacity – 0.7 Cv, 2.7 Cv, 6.6 Cv, 8.0 CvOverall Diameter – ½" NPTMaximum Allowable Pressure – 300 psi (2068 kPa)Maximum Operating FluidTemperature – 200ºF (93°C)Maximum Close-off Pressure – 60 psi (379 kPa)Electrical Rating – 3VA at 24 VAC8” plenum rated cable with AMP Mate-N-Lok connector.This connector is designed to mate withthe optional factory mounted valve harness to make electrical connection quick and simple (120”plenum rated cable with quick connect tabs for control board interface).

VAV-PRC011-EN 55

Dual Duct Model Number Descriptions

Digit 1, 2, 3—UnitTypeVDD= VariTrane dual-duct

Digit 4—Development SequenceF = Sixth

Digit 5, 6—Primary Air Valve05 = 5" inlet (350 cfm)06 = 6" inlet (500 cfm)08 = 6" inlet (900 cfm)10 = 10" inlet (1400 cfm)12 = 12" inlet (2000 cfm)14 = 14" inlet (3000 cfm)16 = 16" inlet (4000 cfm)

Digit 7, 8—Secondary Air Valve05 = 5" inlet (350 cfm)06 = 6" inlet (500 cfm)08 = 8" inlet (900 cfm)10 = 10" inlet (1400 cfm)12 = 12" inlet (2000 cfm)14 = 14" inlet (3000 cfm)16 = 16" inlet (4000 cfm)


Digit 10, 11—Design Sequence** = Factory Assigned

Digit 12, 13, 14, 15—ControlsDD00= Trane Actuator OnlyDD01= UCM4 Cooling Only ControlDD08= UCM4 Dual Duct

Constant VolumeDD11= VV550 DDC Controller -

Cooling OnlyDD18= VV550 DDC Controller w

Constant VolumeDD41= UC400 DDC-Basic (No water or

electric heat)DD48= UC400 DDC-Basic (Constant

Volume)DDSS= Digital SpecialENON= Shaft Out Side for Electric

UnitsFM00= Other Actuator and ControlFM01= Trane Supplied Actuator, Other

CtrlPC03= NC Heating Valve, N.O. Cooling

ValvePCSS= Normally Closed SpecialPN08= N.O. Heat/Cool Actuators &

Linkage OnlyPN09= N.O. Heating, N.O. Cooling,

w/PVR’sPN10= N.O. Heating, N.O. Cooling,

w/PVR’s (CV DISCH)PNON= Shaft Out Side for Pneumatic

UnitsPNSS= Normally Open Special

Notes:N.C. = Normally-closedN.O. = Normally-opened

56

DA Stat = Direct-acting pneumatic t-stat(by others)RA Stat = Reverse-acting pneumatic t-stat(by others)PN = PneumaticFM = Factory installation of customer-supplied controllerPVR = Pneumatic Volume Regulator

Digit 16—InsulationA = 1/2" Matte-facedB = 1" Matte-facedD = 1" Foil-facedF = 1" Double-wallG = 3/8" Closed-cell



Digit 19—Outlet Plenum(Connection is slip & drive)0 = noneA = 1 outlet–RHB = 1 outlet–ENDC = 1 outlet–LHD = 2 outlets–1 RH, 1 ENDE = 2 outlets–1 LH, 1 ENDF = 2 outlets–1 RH, 1 LHG = 2 outlets - ENDH = 3 outlets–1 LH, 1 RH, 1 ENDJ = 4 outlets–1 LH, 1 RH, 2 END

Note: See unit drawings for outlet sizes/damper information.




Digit 23—Transformer0 = None1 = 120/24 volt (50 VA)2 = 208/24 volt (50 VA)3 = 240/24 volt (50 VA)4 = 277/24 volt (50VA)5 = 480/24 volt (50 VA)6 = 347/24 volt (50 VA)7 = 575/24 volt (50 VA)

Digit 24—Disconnect Switch0 = NoneW = WithToggle

Digit 25—Power Fuse0 = NoneW = With


Digit 27—Not Used

0 = N/A






Digit 33—Special Options0 = NoneX = Varies - Factory Assigned

Digit 34—Not UsedBlank

Digit 35—Wireless Sensor0 = Sensor/Receiver Standard1 = Wireless Sensor/Receiver

Mounted

Note: All sensors selected in accessories

Digit 36—DuctTemp Sensor0 = None1 = With DuctTemp Sensor

VAV-PRC011-EN

Dual-Duct VAVTerminal Units

Dual-duct units have two air valves. One heating valve and one cooling air valve modulatesimultaneously to provide occupant comfort.These systems were popular prior to the energy crisisof the early 1970s. Popularity is increasing with system concepts which use one valve formaintaining and monitoring 100% ventilation air.

The features of the dual-ductVAV terminal units are described by the product categories shown inbold. Within each category the options available are listed

Selection Procedure

This section describes the catalog selection of dual-ductVAV terminal units with specific examples.A computer selection program is also available to aid in selection of VAV terminal units.

Selection of dual-duct VAV terminal units can involve two elements:

• Air valve selection

• Acoustics

Air Valve Selection

The wide-open static pressure and airflows are found in the performance data section of thecatalog.To select the air valves, locate the required design cooling and heating airflows for yourterminal unit type and find their vertical intersection, with the smallest air valve size that has apressure drop equal to or lower than the maximum wide-open static pressure requirement.

Example:VDDFTerminal Unit Design cooling airflow: 1000 cfmMaximum wide-open Air pressure drop: 0.25 in. wgMinimum cooling airflow: 500 cfmDesign heating airflow: 1000 cfmMaximum wide-open Air pressure drop: 0.25 in. wgMinimum heating airflow: 400 cfm

From the performance data charts, select a valve size 10 for cooling, which has a wide-open staticpressure drop of 0.09 in. wg. Select a size 10 for heating, which has a wide-open static pressure dropof 0.09 in. wg.

Check the minimum and maximum cfm desired with the minimum and maximum cfm allowed inthe table in the general data section.The maximum setting of 1000 cfm is within the acceptablerange.The desired minimum setting of 500 cfm is acceptable for the unit desired.

Acoustics

The acoustical data found in the "Performance Data" section of the VAV catalog is used to make adetermination of the amount of noise the terminal unit will generate. Locate the table for the VAV

Figure 1. Dual duct terminal unit

VAV-PRC011-EN 57


terminal unit of interest. Sound power data and an equivalent NC level for an AHRI 885-2008transfer function is listed.

Example:VDDF, Cooling-OnlyTerminal Unit, Size 10 cooling, Size 10 heating (See air Valve Selection)Cooling Airflow: 1000 cfmMax. inlet static pressure: 1.5 in. wgHeating Airflow: 1000 cfmMax. inlet static pressure: 1.5 in. wg

Interpolation gives sound power data of:

The NC level above is determined by using either the catalog’s AHRI 885-2008 (mineral fiber forradiated sound) transfer function for the conditions shown in the acoustics table. A differenttransfer function could be applied as conditions dictate.

The maximum NC level is NC-40. If the maximum NC level was exceeded, it would have beennecessary to reselect the next larger unit size.

Computer Selection

The advent of personal computers has served to automate many processes that were previouslyrepetitive and time-consuming. One of those tasks is the proper scheduling, sizing, and selectionof VAV terminal units.Trane has developed a computer program to perform these tasks.Thesoftware is called theTrane Official Product Selection System (TOPSS).

TheTOPSS program will take the user’s input specifications and output the properly sizedVariTrane VAV terminal unit along with the specific performance for that size unit.

The program has several required fields, denoted by red shading in theTOPSS program, and manyother optional fields to meet the criteria you have. Required values include maximum andminimum airflows, control type, and model. If selecting models with reheat, you will be requiredto enter information to make that selection also.The user is given the option to look at all theinformation for one selection on one screen or as a schedule with the other VAV units on the job.

The user can select single-duct, dual-duct, and fan-powered VAV boxes with the program, as wellas most otherTrane products, allowing you to select all yourTrane equipment with one softwareprogram.

The program will also calculate sound power data for the selected terminal unit.The user can entera maximum individual sound level for each octave band or a maximum NC value.The program willcalculate acoustical data subject to default or user supplied sound attenuation data.

Schedule View:The program has many time-saving features such as: 1) Copy/Paste fromspreadsheets like Microsoft® Excel; 2) Easily arranged fields to match your schedule; and 3)Time-saving templates to store default settingsThe user can also export the Schedule View to Excel tomodify and put into a CAD drawing as a schedule. Details regarding the program, its operation, andhow to obtain a copy of it are available from your localTrane sales office.

Octave Band 2 3 4 5 6 7 NC

Disch. Sound Power 83 72 69 67 66 60 39

Rad. Sound Power 69 63 57 54 47 40 34

58 VAV-PRC011-EN


General Data

Table 35. Primary airflow control factory settings (per valve) - I-P

Control TypeAir Valve Size

(in.)Maximum Valve

CfmMaximum

Controller Cfm Minimum Controller CfmConstant Volume

Unit Cfm


56810121416

3505009001400200030004000

40-35060-500105-900165-1400240-2000320-3000420-4000

0,40-3500,60-5000,105-9000,165-14000,240-20000,320-30000,420-4000

40-70060-1000105-1800165-2800240-4000320-6000420-8000


56810121416

3505009001400200028853785

63-35073-500134-900215-1400300-2000408-2885536-3785

0,63-3500,73-5000,134-9000,215-14000,300-20000,408-28850,536-3785

63-70073-1000134-1800215-2800300-4000408-5770536-7570

Table 36. Primary airflow control factory settings (per valve)-SI

Control TypeAir Valve Size

(in.)Maximum Valve

L/sMaximum

Controller L/s Minimum Controller L/sConstant Volume

Unit L/s

Direct Digital Control/UCM

56810121416

16523642566194414161888

19-16528-23650-42577-661111-944151-1416198-1888

0,19-1650,28-2360,50-4250,77-6610,111-9440,151-14160,198-1888

19-33028-47250-85077-1321111-1888151-2832198-3776


56810121416

16523642566194413621787

30-16535-23663-425102-661141-944193-1362253-1787

0,30-1650,35-2360,63-4250,102-6610,141-9440,193-13620,253-1787

30-33035-47263-850

102-1321141-1888193-2723253-3573

Note: Maximum airflow must be greater than or equal to minimum airflow.

VAV-PRC011-EN 59


Performance Data

Table 37. Air pressure drop-in. wg (l-P)

Inlet Size Airflow Cfm VDDF

05

100200300350

0.010.020.040.06

06

100250350500

0.010.080.170.38

08

200400600900

0.010.040.100.24

10

50080011001400

0.020.050.100.17

12

800120016002000

0.010.030.060.10

14

1500200025003000

0.040.070.120.19

16

2000250030004000

0.030.040.060.10

Note: Pressure drops are per air valve

Table 38. Air pressure drop-Pa (SI)

Inlet Size Airflow L/s VDDF

05

4595140165

351115

06

45120165235

3214293

08

95190280420

3112559

10

235375520660

5132642


60 VAV-PRC011-EN


12

375565755940

381524

14

70094511801415

9183046

16

940118014151885

6101425


Table 38. Air pressure drop-Pa (SI) (continued)

Table 39. Integral outlet plenum air pressure drop-in. wg (I-P)

Outlet Diameter(in.)

Airflow(Cfm)

Integral Outlet Configurations

A,C B D,E F G H J

5

100200300350

0.060.230.500.67

0.050.190.440.60

0.020.090.190.26

0.030.090.180.24

----

0.010.030.080.12

----

6

100250350500

0.040.200.380.74

0.030.170.320.63

0.010.070.130.25

0.010.060.110.21

----

0.010.040.080.15

----

8

200400600900

0.110.280.500.88

0.020.100.250.59

0.010.030.070.15

0.010.040.090.22

0.010.020.050.11

0.010.020.040.09

0.010.010.020.03

10

50080011001400

0.070.190.350.56

0.080.190.340.52

0.020.040.070.11

0.030.080.150.24

----

0.010.020.040.07

----

Table 40. Integral outlet plenum air pressure drop-Pa (SI)

Outlet Diameter(mm)

Airflow(L/s)

Integral Outlet Configurations

A,C B D,E F G H J

127

50100140165

1658124166

1248109148

6234965

7224660

----

382130

----

152

50120165235

95195185

84380158

3173262

3152751

----

3101936

----

203

95190280420

2771125219

62662147

281839

3102454

361327

351022

3248

254

235375520660

184687140

204784131

5111827

7193659

----

361117

----

VAV-PRC011-EN 61


A B C D FE G H

NOMINALØ

127 mm (5")152 mm (6")

203 mm (8")254 mm (10")


SYMBOL

II

IIIIV

I

OUTLET AVAILABILITY CHART-SEE OUTL CONVERSION FOR NOMINALØ

A,B,C

H

OUTL

J

VALV

D,E,F

N/A

0505 0606 0808 1010

I, II

N/A

G

I, II, III

N/A

I, II

N/A

N/A

I, II, III

I, II, III

II, III

N/A

N/A

I, II, III

III, IV

II, III, IV III, IV

III, IV

III

III

J

OUTLET PLENUMARRANGEMENTS

(TOP VIEW)

Table 41. Discharge sound power (dB)1, 2, 4

Inlet Size (in)






Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7

5

130 61 54 46 42 41 36 33 59 52 49 48 46 43 61 55 54 55 55 52 61 57 59 61 61 58

200 94 60 50 46 45 42 36 64 56 52 51 47 44 68 61 59 58 56 52 68 62 62 63 62 57

250 118 63 52 49 47 45 39 67 57 54 53 50 45 70 62 58 57 53 50 72 64 61 60 57 53 72 66 65 64 63 57

350 165 70 58 53 51 49 43 73 62 59 56 55 49 78 69 65 63 60 55 80 71 69 68 65 59

6

200 94 59 49 46 45 42 35 64 55 52 50 47 43 68 60 58 58 56 51 67 61 62 62 62 56

300 142 66 54 50 48 46 39 69 60 58 54 52 46 75 66 63 61 58 53 75 68 66 65 63 57

400 189 69 57 53 50 46 40 75 64 61 57 55 49 77 66 63 61 58 53 79 69 66 63 60 55 81 72 70 68 65 59

500 236 67 56 54 50 44 41 77 67 63 58 55 50 85 73 69 66 63 57 86 75 74 71 67 61

8

350 165 64 54 51 50 48 39 70 61 58 57 55 45 73 66 64 64 62 53 73 68 68 68 66 58

520 245 67 56 54 54 52 44 75 64 61 61 58 51 81 72 69 68 65 56 81 73 72 72 69 60

700 330 69 58 56 55 53 46 77 66 63 62 61 54 81 71 69 67 64 58 85 74 72 70 68 60 87 79 76 74 71 62

900 425 71 61 59 56 52 46 78 68 65 64 62 56 86 76 73 72 69 62 91 81 79 76 73 66

12

800 378 70 59 55 53 51 46 78 67 64 62 61 57 83 75 71 69 67 64 83 77 73 71 69 68

1200 566 74 61 56 53 51 46 83 71 64 62 60 56 89 79 73 70 68 65 89 82 77 73 72 69

1550 732

1600 755 74 64 58 55 53 48 84 72 65 62 60 56 90 77 69 68 65 61 92 81 73 71 69 65 94 84 77 75 72 70

2000 944 76 66 61 57 55 50 84 74 67 63 61 56 95 82 74 72 69 65 97 87 78 76 72 69

14

1100 519 70 60 57 57 57 50 79 69 65 65 65 61 84 76 73 71 71 69 84 78 76 73 73 75

1600 755 72 62 57 57 56 50 80 70 65 65 66 60 88 78 74 72 72 70 89 82 77 76 74 74

2100 991 74 65 60 59 58 51 82 72 66 66 66 60 86 76 70 70 70 65 89 79 73 73 72 70 90 83 78 76 75 74

3000 1416 78 68 63 64 63 55 85 75 69 70 69 61 91 82 76 75 74 70 94 86 80 77 76 75

16

1400 661 69 60 57 56 59 54 78 69 67 64 66 63 84 77 73 70 70 72 85 80 77 73 71 76

2100 991 70 61 57 58 60 53 79 70 66 65 66 63 87 78 74 72 72 71 89 82 78 76 73 76

2800 1321 72 64 59 60 62 54 79 71 66 67 67 63 84 76 70 70 71 68 87 78 74 72 72 71 91 83 79 76 75 75

3000 1416

4000 1888 75 67 63 67 67 59 82 74 69 71 71 64 90 81 76 75 75 71 93 85 80 77 76 75

Notes:


62 VAV-PRC011-EN


Table 42. Radiated sound power (dB)1, 2, 4

Inlet Size (in)






Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7

5

130 61 51 44 33 28 24 24 52 46 38 34 29 30 52 48 43 43 39 39 48 49 46 48 47 47

200 94 53 46 36 31 25 23 56 50 42 37 31 29 57 52 48 44 39 39 56 54 51 49 46 46

250 118 55 49 39 33 27 24 58 52 44 39 33 29 59 55 48 42 37 35 59 56 50 45 41 39 59 58 54 51 47 46

350 165 60 53 45 37 31 26 62 57 48 42 36 31 64 60 53 48 42 40 65 63 58 52 47 45

6

200 94 52 45 35 29 24 23 55 48 41 34 28 27 58 51 47 41 36 34 56 53 49 45 42 40

300 142 57 50 40 34 26 23 59 53 45 38 31 27 62 57 50 44 37 34 61 59 55 49 43 39

400 189 58 51 42 34 28 24 63 58 49 42 35 29 64 60 52 45 37 31 65 60 54 47 40 35 66 63 58 51 44 39

500 236 58 52 45 36 31 27 66 60 51 42 37 30 69 65 57 50 43 37 71 67 60 55 46 41

8

350 165 56 49 40 34 28 25 60 55 47 41 33 28 63 59 53 46 39 35 62 61 55 49 44 40

520 245 57 52 44 37 31 26 64 58 51 44 37 30 68 64 57 50 43 36 67 66 60 54 46 41

700 330 60 55 47 40 34 28 66 61 52 46 39 32 69 64 57 51 43 36 71 67 59 53 45 39 73 72 64 58 49 44

900 425 60 56 48 41 37 31 67 64 55 48 43 36 73 70 61 55 48 43 76 74 66 60 52 46

12

800 378 61 51 45 39 32 22 66 59 50 45 38 31 70 64 57 50 44 39 71 67 60 52 47 44

1200 566 64 54 48 41 36 25 71 62 52 47 42 34 75 69 59 52 47 42 77 72 64 55 50 47

1550 732 65 57 47 42 40 28 73 64 53 47 46 36 81 72 61 53 49 45 83 75 65 56 52 48

1600 755 78 68 58 50 47 41

2000 944 66 59 48 44 45 35 75 66 54 48 48 40 85 74 62 53 51 47 88 79 67 57 53 50

14

1100 519 58 50 43 39 33 23 67 58 52 45 40 34 72 66 60 51 45 40 72 68 64 53 48 46

1600 755 61 53 44 40 36 24 69 60 53 47 42 32 76 68 61 53 47 41 79 73 66 55 49 46

2100 991 63 55 46 42 40 27 71 62 53 47 44 35 76 66 57 50 47 39 78 69 61 52 48 43 82 73 66 56 51 46

3000 1416 66 60 50 46 49 36 75 66 55 50 50 40 85 73 61 54 52 47 88 77 66 57 53 48

16

1400 661 57 50 46 43 37 25 65 58 52 48 42 34 73 66 60 50 45 42 72 70 64 53 46 47

2100 991 59 53 48 46 42 28 67 60 54 50 47 36 75 68 62 53 49 45 78 73 66 56 49 48

2800 1321 74 66 58 53 52 44

3000 1416 61 56 50 50 48 33 69 62 54 52 52 40 78 69 61 55 53 47 83 74 66 58 53 51

4000 1888 65 61 54 54 59 43 71 65 58 55 60 49 83 72 63 58 59 54 89 76 66 61 58 55

Notes:


VAV-PRC011-EN 63


Table 43. Sound noise criteria (NC)

Discharge1,2,4 Radiated1,2,4

Inlet Size (in)

Inlet Pressure (Ps)3,5 Inlet Size (in)

Inlet Pressure (Ps)3,5

CFM l/s 0.5” 1.0” 1.5” 2.0” 3.0” CFM l/s 0.5” 1.0” 1.5” 2.0” 3.0”

5

130 61 -- -- 16 21

5

130 61 -- -- 16 20200 94 -- 20 25 25 "200 94 -- 18 22 25250 118 19 24 28 30 30 250 118 17 20 24 25 28350 165 28 32 38 41 350 165 22 26 30 33

6

200 94 -- 16 21 20

6

200 94 -- 16 21 23300 142 19 23 30 30 "300 142 19 21 26 30400 189 23 30 33 35 38 400 189 20 27 30 30 33500 236 20 33 43 44 500 236 20 30 36 38

8

350 165 16 24 28 28

8

300 142 17 24 28 31520 245 20 30 38 38 500 236 20 27 34 37700 330 23 33 38 43 46 700 330 24 31 34 38 44900 425 25 34 44 51 900 425 25 34 42 46

10

550 260 16 26 32 32

10

500 236 20 25 30 34820 387 20 30 39 39 800 378 22 29 36 391100 519 24 33 39 43 46 1100 519 22 31 36 39 431400 661 28 35 46 50 1400 661 24 35 43 47

12

800 378 21 32 38 38

12

650 307 24 30 35 381200 566 27 38 46 46 1100 519 27 36 42 441550 732 1550 732 29 39 49 521600 755 27 39 47 50 52 1600 755 452000 944 29 39 54 56 2000 944 30 42 54 58

14

1100 519 21 33 39 39

14

900 425 20 31 38 391600 755 24 34 45 46 1500 708 24 34 43 472100 991 27 37 42 46 47 2100 991 26 36 43 45 513000 1416 32 41 48 52 3000 1416 30 42 54 58

16

1400 661 20 32 39 41

16

1200 566 20 29 39 422100 991 21 33 43 46 2000 944 22 31 42 452800 1321 24 33 39 43 48 2800 1321 403000 1416 3000 1416 25 34 45 524000 1888 28 37 47 51 4000 1888 31 36 52 60

Notes:

1. "--" represents NC levels below NC 15. 2. NC Values are calculated using modeling assumptions based on AHRI 885-2008-02 Addendum. 3. Data at 1.5" inlet pressure constitute AHRI 880-2011 Standard Rating Conditions 4. Where Ps is the inlet static pressure minus discharge static. 5. Data at 0.5", 1.0", 2.0"& 3.0" are application ratings. These ratings are outside the scope of the certification program.

Table 44. AHRI 885-2008 radiated transfer function assumptions


Type 2- Mineral Fiber InsulationTotal dB reduction

-18-18

-19-19

-20-20

-26-26

-31-31

-36-36

Notes: Subtract from terminal unit sound power to determine radiated sound pressure in the space. 1. NC Values are calculated using modeling assumptions based on AHRI 885-2008. 2. Where DPs is inlet static pressure minus discharge static pressure. 3. Application ratings are outside the scope of the Certification Program.

Table 45. AHRI 885-2008 discharge transfer function assumptions


Small Box (<300 Cfm)Medium Box (300-700 Cfm)Large Box (>700 Cfm)

-24-27-29

-28-29-30

-39-40-41

-53-51-51

-59-53-52

-40-39-39

Notes: Subtract from terminal unit sound power to determine discharge sound pressure in the space. 1. NC Values are calculated using modeling assumptions based on AHRI 885-2008. 2. Where DPs is inlet static pressure minus discharge static pressure. 3. Application ratings are outside the scope of the Certification Program.

64 VAV-PRC011-EN


Dimensional Data

COOLINGCONTROL BOX

HEATINGCONTROL BOX

H

W

14.00"[356 mm]

L

SLIP & DRIVECONNECTION

14.60"[371 mm]

C D

AIRVALVE

COOLING

AIRVALVE

HEATING

AIRFLOW

ARRANGEMENT "H"1.50" [38 mm] FLANGE

9.50" [241 mm]

FLOW RINGTUBING

FLOW RINGTUBING

DISCHARGEDIMENSIONS (BxA)

TOP VIEW

BACK VIEW SIDE VIEW

15.50" [394 mm]

4.00" [102 mm]

21.50" [546 mm]

5.40" [137 mm]

DUAL-DUCT WITH OUTLET PLENUM (VDDF)

12" [305mm]


6" [152mm]

5" [127mm]

10" [254mm]

8" [203mm]

INLET SIZE (NOMINAL Ø)

IIIIIIV

SYMBOLI

06 900

08

10

08

08

2000

1400

1400

900

INLET

05

05

06

350

500

500

CFM

236

425

661

425

425

165

236

165

L/s

OUTL

NOMINALØ

6" [152mm]

8" [203mm]10" [254mm]

5" [127mm] A,B,CD,E,F

JH

VALV

I, II

N/AI, II

0505I, II, III

24.00" [610mm]

22.00" [559mm]

L W

I, II, III

N/AI, II, III

0606II, III

II, III, IV

I, II, IIIN/A

0808III, IV

III, IV

IIIIII,IV

1010N/A

DISCHARGE DIMENSIONS

20.00" [508mm]

14.00" [356mm]

A B

WT

55 [25]

58 [26]

61 [28]

56 [25]57 [26]

[kg]54 [24]

LBS

A CB D E F JH

(TOP VIEW)ARRANGEMENTS

OUTLET PLENUM

G

G IIIN/AN/AN/A

06

06

05

10

08

10

12

08

12 59 [27]661200010

12 2000 994 60 [27]12

14" [356mm]14 3000 1416 81 [37]14

16 1888400016 16" [406mm] 83 [38]

COOL HEAT HEATCOOL

4000

3000

2000

1400

350

500

350

900

900

1400

900

500

COOL HEAT

1888

1416

994

994

236

236

165

425

661

661

994

425

COOL HEAT

16" [406mm]

14" [356mm]

8" [203mm]

10" [254mm]

5" [127mm]

6" [152mm]

8" [203mm]

10" [254mm]

12" [305mm]

20.00" [508mm]

8.00" [203mm]

7.00" [178mm]

7.00" [178mm]

10.00" [254mm]

C D

10.00" [254mm]

7.00" [178mm]

7.00" [178mm]

8.00" [203mm]

8.00" [203mm]9.00" [229mm]

28.00" [711mm]

40.00" [1016mm]

H

15.50" [394mm]

21.50" [546mm]

54 [24]

54 [24]

1. Outlet combinations to remote diffusers haveoptional integral balancing dampers (seespecification sheet).


duct required for proper flow reading.3. Minimum of 1.5 duct diameters of straight

4. Allow 36" [914mm] on control side for servicing

based on selected options, insulation type, etc.5. Weights are an estimation and will vary

should be equal discharge size (A x B).of unit before first runout & inside of the duct

6. Allow 48" [1219] of straight duct downstream

VAV-PRC011-EN 65


COOLINGCONTROL BOX PNEUMATIC CONTROLS AREA (SEE NOTES)

HEATINGCONTROL BOXPNEUMATIC CONTROLS AREA (SEE NOTES)

H

W

12.50"[318 mm]

L

14.60"[371 mm]

A B

AIRVALVE

COOLING

AIRVALVE

HEATING

AIRFLOWDISCHARGE OUTLET

9.50" [241 mm]

FLOW RINGTUBING

TOP VIEW

BACK VIEW SIDE VIEW

4.00"[102 mm]

C

5.40"[137 mm]

SEE CHART ABOVE

FLOW RING

FLOW RING TUBING CONNECTS TO HEATING SIDE CONTROL

DISCHARGE IS CENTEREDON BACK OF UNIT.

54 [24]

54 [24]

21.50" [546mm]

15.50" [394mm]

H

40.00" [1016mm]

28.00" [711mm]

9.00" [229mm]8.00" [203mm]

8.00" [203mm]

7.00" [178mm]

7.00" [178mm]

10.00" [254mm]

BA

10.00" [254mm]

7.00" [178mm]

7.00" [178mm]

8.00" [203mm]

12" [305mm]

10" [254mm]

8" [203mm]

6" [152mm]

5" [127mm]

10" [254mm]

8" [203mm]

14" [356mm]

16" [406mm]

HEATCOOL

425

994

661

661

425

165

236

236

994

994

1416

1888

HEATCOOL

500

900

1400

900

900

350

500

350

1400

2000

3000

4000

COOL HEATHEATCOOL

83 [38]16" [406mm]16 4000 188816

14 81 [37]1416300014 14" [356mm]

12 60 [27]994200012

10 2000 661 59 [27]12

08

12

10

08

10

05

06

06

LBS

54 [24][kg]

57 [26]56 [25]

61 [28]

58 [26]

55 [25]

WTWL

22.00" [559mm]

24.00" [610mm]

L/s

165

236

165

425

425

661

425

236

CFM

500

500

350

06

05

05

INLET

900

1400

1400

2000

08

08

10

08

90006

INLET SIZE (NOMINAL Ø)

8" [203mm]

10" [254mm]

5" [127mm]

6" [152mm]

12" [305mm]

DUAL-DUCT WITH OUTLET PLENUM (VDDF)

2. No control box provided for the following options:ENON, PNON, DD00 and Pneumatic controls.

1. See mechanical specifications for general unit clearances.

12" [305mm]

6" [152mm]

5" [127mm]

10" [254mm]

8" [203mm]

14" [356mm]

16" [406mm]

C

66 VAV-PRC011-EN


Mechanical Specifications

(MODEL VDDF)

Dual-DuctTerminal Unit

CASING

22-gage galvanized steel.

Hanger brackets provided.

AGENCY LISTING

The unit is UL and Canadian ULListed as a room air terminal unit. Control # 9N65.

AHRI 880 Certified.

INSULATION

1/2" (12.7 mm) Matte-faced Insulation—The interior surface of the unit casing is acousticallyand thermally lined with ½-inch, 1.5 lb/ft3 (12.7 mm, 24.0 kg /m3) composite density glass fiber witha high-density facing.The insulation R-Value is 1.9.The insulation is UL listed and meets NFPA-90Aand UL 181 standards.There are no exposed edges of insulation (complete metal encapsulation).

1" (25.4 mm) Matte-faced Insulation—The interior surface of the unit casing is acoustically andthermally lined with 1-inch, 1.0 lb/ft3 (25.4 mm, 16.0 kg /m3) composite density glass fiber with ahigh-density facing.The insulation R-Value is 3.85.The insulation is UL listed and meets NFPA-90Aand UL 181 standards.There are no exposed edges of insulation (complete metal encapsulation).

1" (25.4 mm) Foil-faced Insulation—The interior surface of the unit casing is acoustically andthermally lined with 1-inch, 1.5 lb/ft3 (25.4 mm, 24.0 kg/m3) density glass fiber with foil facing.Theinsulation R-Value is 4.3.The insulation is UL listed and meets NFPA-90A and UL 181 standards aswell as bacteriological standard ASTM C 665.There are no exposed edges of insulation (completemetal encapsulation).

1" (25.4 mm) Double-wall Insulation—The interior surface of the unit casing is acoustically andthermally lined with a 1-inch, 1.0 lb./ft3 (25.4 mm, 16.0 kg/m3) composite density glass fiber withhigh-density facing.The insulation R-value is 3.0.The insulation is UL listed and meets NFPA-90Aand UL 181 standards. An interior liner made of 26-gage galvanized steel covers the insulation. Allwire penetrations are covered by grommets.There are no exposed edges of insulation (completemetal encapsulation).

3/8" (9.5 mm) Closed-cell Insulation—The interior surface of the unit casing is acoustically andthermally lined with 3/8-inch, 4.4 lb/ft3 (9.5 mm, 70.0 kg/m3) closed cell insulation.The insulationis UL listed and meets NFPA-90A and UL 181 standards.The insulation has an R-Value of 1.4.Thereis complete metal encapsulation.

VAV-PRC011-EN 67


PRIMARY AIR VALVES

Air Valve Round —The primary air inlet connection is an 18-gage galvanized steel cylinder sizedto fit standard round duct.A multiple-point, averaging flow sensing ring is provided with balancingtaps for measuring +/-5% of unit cataloged airflow.

An airflow-versus-pressure differential calibration chart is provided.The damper blade isconstructed of a closed-cell foam seal that is mechanically locked between two 22-gage galvanizedsteel disks.The damper blade assembly is connected to a cast zinc shaft supported by self-lubricating bearings.The shaft is cast with a damper position indicator.The valve assemblyincludes a mechanical stop to prevent over-stroking.At 4.0 in. wg, air valve leakage does not exceed1% of cataloged airflow.

OUTLET CONNECTION

Slip & Drive Connection—Terminal units come standard with slip & drive connection.

Outlet Plenum/Attenuator—A sheet metal, insulated plenum/attenuator with circularopening(s) is attached to the discharge of the main unit at the factory.The circular opening(s) arecentered on the unit plenum to accept round ductwork connections.

Outlet Plenum/Attenuator with Balancing Dampers—A sheet metal, insulated plenum/attenuator with circular opening(s) is factory-connected to the main unit.The circular opening(s)with balancing damper(s) are centered on the unit plenum to accept round ductwork connections.

UNIT CONTROLS SEQUENCE OF OPERATION

Unit controller continuously monitors zone temperature against its setpoint and varies primaryairflow as required to meet zone setpoints. Airflow is limited by minimum and maximum positionsetpoints.

DIRECT DIGITAL CONTROLS

DDC Actuator—Trane 3-wire, 24-VAC, floating-point quarter turn control actuator with linkagerelease button. Actuator has a constant drive rate independent of load, a rated torque of 35 in-lb,a 90-second drive time, and is non-spring return.Travel is terminated by end stops at fully-openedand -closed positions. An integral magnetic clutch eliminates motor stall.

DDCActuator - Belimo — LMB24-3-TTN 3-wire, 24VAC/DC, floating-point, quarter turn actuatorwith linkage release button. Actuator has a constant drive rate independent of load, a rated torqueof 45 in-lb, a 95 second drive time, and is non-spring return.Travel is terminated by end stops at

Table 46. Air valve combinations available

Air Valve Size in. (mm)Cooling

Cataloged Airflow cfm (L/s)

Cooling

Air Valve Size in. (mm)Heating

Catalog Airflow cfm(L/s)

Heating

05 (127) 350 (165) 05 (127) 350 (165)

06 (152) 500 (236) 05 (127) 350 (165)

06 (152) 500 (236) 06 (152) 500 (236)

08 (203) 900 (425) 06 (152) 500 (236)

08 (203) 900 (425) 08 (203) 900 (425)

10 (254) 1400 (661) 08 (203) 900 (425)

10 (254) 1400 (661) 10 (254) 1400 (661)

12 (305) 1400 (944) 08 (203) 900 (425)

12 (305) 2000 (944) 10 (254) 1400 (661)

12 (305) 2000 (944) 12 (305) 2000 (944)

14 (356) 3000 (1416) 14 (356) 3000 (1416)

16 (406) 4000 (1888) 16 (406) 4000 (1888)

68 VAV-PRC011-EN


fully-opened and -closed positions. Internal electronic control prevents motor stall when motorreaches end stops.

Direct Digital Controller—The microprocessor based terminal unit controller provides accurate,pressure-independent control through the use of a proportional integral control algorithm anddirect digital control technology.The controller, named the Unit Control Module (UCM), monitorszone temperature setpoints, zone temperature and its rate of change, and valve airflow using adifferential pressure signal from the pressure transducer. Additionally, the controller can monitoreither supply duct air temperature or CO2 concentration via appropriate sensors.The controller isprovided in an enclosure with 7/8" (22 mm) knockouts for remote control wiring. ATrane UCM zonesensor is required.

DDC Zone Sensor—The UCM controller senses zone temperature through a sensing elementlocated in the zone sensor. In addition to the sensing element, zone sensor options may include anexternally-adjustable setpoint, communications jack for use with a portable edit device, and anoverride button to change the individual controller from unoccupied to occupied mode.Theoverride button has a cancel feature that will return the system to unoccupied.Wired zone sensorsutilize a thermistor to vary the voltage output in response to changes in the zone temperature.Wiring to the UCM controller must be 18 to 22 awg. twisted pair wiring.The setpoint adjustmentrange is 50–88ºF (10–31°C). Depending upon the features available in the model of sensor selected,the zone sensor may require from a 2-wire to a 5-wire connection.Wireless zone sensors report thesame zone information as wired zone sensors, but do so using radio transmitter technology.Therefore with wireless, wiring from the zone sensor to the UCM is unnecessary.

Digital Display Zone Sensor with Liquid Crystal Display (LCD)—The digital display zonesensor contains a sensing element, which sends a signal to the UCM.A Liquid Crystal Display (LCD)displays setpoint or space temperature. Sensor buttons allow the user to adjust setpoints, andallow space temperature readings to be turned on or off.The digital display zone sensor alsoincludes a communication jack, for use with a portable edit device, and an override button tochange the UCM from unoccupied to occupied.The override button has a cancel feature, whichreturns the system to unoccupied mode.

System Communications—The Controller is designed to send and receive data from aTracer™SC or otherTrane controllers. Current unit status conditions and setpoints may be monitored and/or edited via this data communication feature.The network type is a twisted wire pair shieldedserial communication.

PNEUMATIC CONTROLS

Normally-OpenActuator—Pneumatic 3 to 8 psig (20 to 55 kPa) spring-range pneumatic actuator.

Normally-Closed Actuato—Pneumatic 8 to 13 psig (55 to 90 kPa) spring-range pneumaticactuator.

3011 Pneumatic Volume Regulator (PVR)—The regulator is a thermostat reset velocitycontroller, which provides consistent air delivery within 5% of cataloged flow down to 18% or lessof unit cataloged cfm, independent of changes in system static pressure. Factory-calibrated, field-adjustable setpoints for minimum and maximum flows. Average total unit bleed rate, excludingthermostat, is 28.8 scim at 20 psig (7.87 mL/min at 138 kPa) supply.

3501 Pneumatic Volume Regulator (PVR)—The 3501 regulator is a linear reset volumecontroller.This PVR is used to maintain a constant volume of airflow from the dual-duct unit whenconstant volume control is used. Average total unit bleed rate, excluding thermostat, is 43.2 scimat 20 psig (11.8 mL/min at 138 kPa) supply.

CONTROL OPTIONS

Transformer—The 50-VA transformer is factory-installed in an enclosure with 7/8" (2 mm)knockouts to provide 24 VAC for controls.

Disconnect Switch – A toggle disconnect disengages primary power to the terminal.

Fuse – Optional fuse is factory-installed in the primary voltage hot leg.

VAV-PRC011-EN 69

DDC Controls

Control Logic

DDC controllers are today’s industry standard. DDC controllers provide system-level data used tooptimize system performance. Variables such as occupied/unoccupied status, minimum andmaximum airflow setpoints, temperature and temperature setpoints, valve position, fan status (onor off, and mode of operation: series or parallel), reheat status (on or off), box type and air valvesize, temperature correction offsets, flow correction values, ventilation fraction, etc. are availableon a simple twisted-shielded wire pair.

Trane DDC controllers provideTrane-designed, solid-state electronics intended specifically forVAVtemperature control in space comfort applications. DDC control capabilities include:

• Proportional plus integral control loop algorithm for determining required airflow needed tocontrol room temperature. Airflow is limited by active minimum and maximum airflowsetpoints.

• Pressure-independent (PI) operation, which automatically adjusts valve position to maintainrequired airflow. In certain low-flow situations or in cases where the flow measurement hasfailed, the DDC controller will operate in a pressure-dependent (PD) mode of operation.

• Cooling and heating control action of air valve. In cooling control action, the DDC controllermatches cooling airflow to cooling load. In heating control action, the DDC controller matchesthe heating airflow to control heating load.The DDC controller will automatically change overto cooling control action if the supply air temperature is below the room temperature and willautomatically change over to heating control action if the supply air temperature is 10°F or moreabove the room temperature. If the supply air temperature is between the room temperatureand the room temperature plus 10°F, then the DDC controller will provide the active minimumairflow.The DDC controller first chooses theTracer™ SC -supplied supply air temperature valueto use for auto changeover. If this is not available, it uses the temperature provided by theoptional auxiliary temperature sensor. If this is also not available, it uses the heating/coolingmode assigned byTracer SC or the DDC controller’s service tool (Everyware™or Rover™ V4).

• Multiple reheat control options including staged electric, staged hot-water (normally on ornormally off), proportional hot-water, and slow pulsed width modulation. Modulating reheatoptions utilize a separate reheat proportional-plus-integral control loop from that controllingairflow into the room. Staged reheat options utilize a control algorithm based on heatingsetpoint and room temperature.

• 24VAC binary input that can be configured as a generic input or as occupancy input.When theDDC controller is operation withTracer SC, the status of the input is provided toTracer SC forits action. In stand-alone operation and when configured for an occupancy input, the input willcontrol occupancy status of the DDC controller.

• Auxiliary temperature analog input that can be configured for an auxiliary temperature sensoror a 2-to-10VDC CO2 sensor.When sensor is mounted in the supply air duct and configured fortemperature, the value of the input is used as status-only byTracer SC ifTracer SC is providinga supply air temperature to the DDC controller. Otherwise, the input will be used fordetermining control action of the DDC controller.When configured for a CO2 sensor, the valueof the input is used as a status-only input byTracer SC.

• Dual-duct support with two DDC controllers. One DDC controller controls the cooling air valveand the other controller controls the heating air valve. With constant-volume sequences, thedischarge air volume is held constant by controlling discharge air volume with the heatingUCM.

70 VAV-PRC011-EN

DDC Controls

Note: Flow sensor DP (in. wg) is measured at the flow ring to aid in system balancing and commissioning. See “Valve/Controller Airflow Guidelines” in each section for unit performance.

DDC Remote Heat Control Options

When heat is added to the primary air at the VAV unit before it enters the zone, the air is said tobe reheated.The operating characteristics of the four basic types ofVariTrane DDC terminal reheatare discussed.

Single-Duct: On/Off Hot Water Reheat

Three stages of on/off hot water reheat are available.The water valves used are 2-position and areeither fully-opened or fully-closed.The heating minimum airflow setpoint is enabled during reheat.

Stage 1 energizes when the space temperature is at or below the heating setpoint.When the zonetemperature rises above the active heating setpoint by 0.5°F (0.28°C), stage 1 is de-energized. Stage2 energizes when the space temperature is 1°F (0.56°C) or more below the active heating setpoint,and is de-energized when the space temperature is 0.5°F (0.28°C) below the active heating setpoint.Stage 3 energizes when the zone temperature is 2°F (1.11°C) or more below the active heatingsetpoint, and de-energizes when the space temperature is 1.5°F (0.83°C) below the active heatingsetpoint. When reheat is de-energized, the cooling minimum airflow setpoint is activated.

Single-Duct: Proportional Hot Water Reheat

Proportional hot water reheat uses 3-wire floating-point-actuator technology.The heatingminimum airflow setpoint is enabled during reheat.

The water valve opens as space temperature drops below the heating setpoint. Water valveposition is dependent on both the degree that space temperature is below the active heatingsetpoint and the time that the space temperature has been below the active heating setpoint. If notalready closed, the water valve fully closes when the zone temperature rises above the activeheating setpoint by 0.5 °F (0.28 °C). An additional on/off remote heat output is available andenergized when the proportional valve is driven 100% open and de-energized when theproportional valve reaches 50% open.When reheat is de-energized, the cooling minimum airflowsetpoint is activated.

Figure 2. Flow sensor signal vs. airflow delivery

0.01

0.1

1

5

10 100 1,000 10,000Cfm

Flow

Sens

orDP

(In.w

g)

4" 12"10"

8"6"5"

14"

16"

VAV-PRC011-EN 71

DDC Controls

Single-Duct: On/Off Electric Reheat

Three stages of staged electric reheat are available.The heating minimum airflow setpoint isenabled during reheat.

Stage 1 is energized when the space temperature falls below the active heating setpoint andminimum airflow requirements are met.When the zone temperature rises above the active heatingsetpoint by 0.5°F (0.28°C), stage 1 is de-energized. Stage 2 energizes when the space temperatureis 1°F (0.56°C) or more below the active heating setpoint, and is de-energized when the spacetemperature is 0.5°F (0.28°C) below the active heating setpoint. Stage 3 energizes when the zonetemperature is 2°F (1.11°C) or more below the active heating setpoint, and de-energizes when thespace temperature is 1.5°F (0.83°C) below the active heating setpoint.When reheat is de-energized,the cooling minimum airflow setpoint is activated.

Single-Duct: Pulse-Width Modulation of Electric Heat

Electric heat is modulated by energizing for a portion of a three-minute time period.The heatingminimum airflow setpoint is enabled during reheat.This allows exact load matching for energyefficient operation, and optimum zone temperature control. One or two stages can be used.

The amount of reheat supplied is dependent on both the degree that space temperature is belowthe active heating setpoint and the time that the space temperature has been below the activeheating setpoint. If not already off, reheat de-energizes when the zone temperature rises more than0.5°F (0.28°C) above the heating setpoint.

The Stage 1 “on” time is proportional to the amount of reheat required. For example, when 50%of stage 1 capacity is required, reheat is on for 90 seconds and off for 90 seconds. When 75% ofstage 1 capacity is required, reheat is on for 135 seconds and off for 45 seconds. When 100% ofstage 1 capacity is required, reheat is on continuously.

Stage 2 uses the same “on” time logic as stage 1 listed above, except stage 1 is always energized.For example, when 75% of unit capacity is required, stage 1 is energized continuously, and stage2 is on for 90 seconds and off for 90 seconds. When reheat is de-energized, the cooling minimumairflow setpoint is activated.

Single-Duct: SCR Modulation of Electric Heat

72 VAV-PRC011-EN

DDC Controls

Heat Controls24-VAC Fan/Staged

2nd

1st

C

Fan

Load: 10 VA (MAGN)

Load: 12 VA (MERC)

Load: 6.5 VA

FAN RELAY

2

1

3

5

4

2

1

HEATER CONTROL BOX

3rd

2

3

4

5.

DamperActuator

Line Voltage

CW

COM

CCW

24 VAC, 50 VATransformer

Load: 4 VA

24-VAC toCustomerControls

By OthersDamper Controls

24-VACM

Load: 4 VAActuatorDamper24-VAC

Damper ControlsBy Others

COM

CW

CCW

M

Y

BL

NOTES:

1. Factory-installedField Wiring

Optional or installed by others

2.

Only available with fan-powered units.3.

4. Located in HeaterTerminal box.

Only available with dual-duct units.5.

DD00—Available for all VariTrane Units(Trane actuator for field-installed DDC controls)A unit controller is not provided.The air damper actuator is provided with an integral screw terminal block.The fan contactor (fan-powered units), 24-VAC control power transformer (optional for single- and dual-ductunits), and factory-installed electric heater contactor wires are attached to the outside of the unit for fieldconnection of controls. A second actuator is provided with an integral screw terminal for dual-duct units.

Located in HeaterTerminal Box for electric heat on single-duct units.Located in Control Box for cooling only and hot water heat on single-duct units.Located in Control Box on all fan-powered units.

VAV-PRC011-EN 73

DDC Controls

LO

1st stage

2nd stage

3rd stage

24VAC (hot) common

CCW

COM

CW

24 VAC

Y

BL

24 VAC, 50vaStandard – (Fan-powered)

Optional – (Single-duct and Dual-duct)

Transformer

Customer-furnishedController

ElectricReheat

Contactors

Hot WaterReheat

FanRelay

Actuator Customer-furnishedorTrane-supplied

Trane-supplied(Fan-powered only)

Trane-supplied

Available on all VariTrane UnitsFM00 – Customer-supplied actuator and DDC controller factory-installed.FM01 –Trane actuator and customer-supplied DDC controller factory-installed

Optional or installed by others

NOTES:

1. Factory-installed

Field Wiring

OptionalTrane-supplied

water valvefield-wired

to controller.

AirflowSensor

LO HI Trane-supplied

All customer furnished controllers and actuators are installed and wired per control manufacturer's specifications.Metal control enclosure is standard.

2. NEMA-1 Enclosure provided.

74 VAV-PRC011-EN

DDC Controls

Tracer UC400 and UC210 Programmable BACnet Controllers

Introduction

TheTracer™ UC400 and UC210 controllers areprogrammable general purpose BACnet™,microprocessor-based, Direct Digital Controllers (DDC). When factory installed onTrane (VariableAirVolume)VAV terminal units, they are factory downloaded with appropriateVAV programs andconfiguration settings.TraneVAV units have been made with either pneumatic, analog electronic,or microprocessor controls (DDC VAV). UC400 is not an option on Dual Duct.

TheTracer UC400 or UC210 controller can be configured from the factory with three differentapplication programs: SpaceTemperature Control (STC),Ventilation Flow Control (VFC), and FlowTracking Control (FTC).

TheTracer UC400 or UC210 controller programmed for STC modulates a VAV's damper bladebased on a zone temperature, measured airflow, and setpoints to continuously control conditionedair delivery to the space.The volume of incoming air is monitored and the damper adjusts toprovide accurate control independent of the duct pressure.The damper modulates betweenoperator setpoints depending on space conditions. Additionally, fan and heat outputs may beenergized depending on the application.

TheTracer UC400 or UC210 controller configured forVFC can be applied to aVAV terminal and usedto temper cold outdoor air (OA) that is brought into a building for ventilation purposes.Thetempered air is intended to supply an air-handling unit (AHU), which provides comfort control tothe zones it is serving.The VAV terminal supplies the correct amount of ventilation air, and whenreheat is added, tempers the ventilation air to reduce the load on the air handler by sensing thedischarge air temperature of the VAV unit and controlling its long-term average to the dischargeair temperature setpoint.

TheTracer UC400 or UC210 controller can be configured for FTC and has twoVAV units withTracerUC400 or UC210 controllers working together to provide flow tracking control. OneTracer UC400or UC210 controller is configured from the factory with the Space temperature program and theother is downloaded with the FTC program.The STC airflow output is bound to the flow trackingcontroller airflow setpoint input.The flow tracking controller adds the configured airflow trackingoffset (positive or negative) to the airflow setpoint (communicated airflow setpoint) and controlsthe airflow to this setpoint.

TheTracer UC400 or UC210 controller is BTL compliant with BACnet, an open standard buildingautomation protocol. It meets the Application Specific Controller (ASC) profile per ASHRAE 135-2004.This allows theTracer UC400 controller to integrate with other BACnet systems.

Available Inputs

Inputs include a twisted/shielded communication link, zone sensor, duct temperature sensors(optional), Occupancy Sensor (optional), Discharge AirTemperature (DAT) and/or Supply AirTemperature (SAT), CO2 sensor, and 24 VAC power. In addition to the points used for the VAVapplication, the spare inputs and outputs on theTracer UC400 controller may be used for ancillarycontrol, which can be programmed usingTracerTUTracer Graphical Programming 2 (TGP2).

Note: For more information on using spare points, see BAS-SVX20*-ENTracer UC400Programmable Controller Installation, Operation, and Maintenance.

General Features and Benefits

Assured Accuracy

• Proportional-plus-integral control loop algorithm for determining required airflow needed tocontrol room temperature. Airflow is limited by active minimum and maximum airflowsetpoints.

VAV-PRC011-EN 75

DDC Controls

• Pressure-independent (PI) operation that automatically adjusts valve position to maintainrequired airflow. In certain low-flow situations or in cases where the flow measurement hasfailed, the DDC controller will operate in a pressure-dependent (PD) mode of operation.

• When combined with the patentedTrane Flow ring and pressure transducer, flow is repeatableto +/- 5% accuracy across the Pressure Independent (PI) flow range. (See Valve/ControllerAirflow Guidelines section).

• Improved 2-Point Air Balancing is available – Assures optimized flow-sensing accuracy acrossthe operating range.This provides a more accurate airflow balancing method when comparedto typical single-point flow correction air balancing.

• Analog input resolution of +/- 1/8°F within the comfort range maximizes zone temperaturecontrol yielding excellent comfort control.

Reliable Operation

• Built for life –Trane products are designed to stand the test of time, with a proven design lifethat exceeds 20 years.

• Fully factory tested – fully screened and configured at the factory. All features are testedincluding fan and reheat stage energization, air valve modulation, and controller inputs andoutputs.

Safe Operation

• All components, including the controller, pressure transducer, transformer, etc. are mountedin a NEMA 1 sheet metal enclosure and are tested as an assembly to UL1995 standards.Theresult is a rugged and safe VAV, controller, and thus, overall unit.

• When in PI-mode, EH is disabled when the sensed flow is below the minimum required.

• HW coilVAV units in ventilation flow control (VFC) have a Freeze protection algorithm to protectthe water coil and the internal space from water damage.This is accomplished by driving thewater valve to maximum position on alarm conditions.

System-Level Optimization

Trane controllers are designed to integrate intoTraneTracer™ Building Automation Systems andleverage clear and clean unit-controller related data for system level control decisions. IntegratingaTraneVV550 controller into aTracer SC Control System provides the next step in building systemcontrol.

Specifically, system-level decisions on how to operate all components can be made. Energyefficient optimization strategies like Static Pressure Optimization, Ventilation Reset, and CO2Demand-controlledVentilation can be employed with the simple press of a button.The end-resultis the most efficient and reliable building control system available.

Simplified Installation

Factory Commissioned Quality – AllTrane DDC VAV controllers are factory-commissioned.Thismeans that the DDC boards are powered and run-tested with your specific sequence parameters.They are connected to a communication link to make sure that information and diagnostic datafunction properly. Before anyVariTrane™VAV unit ships they must pass a rigorous quality controlprocedure.You can be assured that aTrane VAV unit withTrane DDC VAV controls will work rightout of the crate.

Zone sensor air balance – When applied to aTrane zone sensor with thumbwheel and on/cancelbuttons, a balancing contractor can drive the primary air valve to maximum or minimum airflowfrom the sensor to determine the point of calibration to be used (maximum will result in optimumperformance).The flow reading can then be calibrated from the sensor, without the use ofadditional service tools. (Non-LCD versions)

Tenant-Finish Heat Mode – In some office projects, the building is being constructed as tenants arebeing identified.Tenant-finish heat mode is designed for applications when a given floor has not

76 VAV-PRC011-EN

DDC Controls

been occupied.The main AHU system is used for heat and because the internal furnishings are notcomplete, the sensors have not been installed. In this case, the primary valve drives open usingthe heat of the main AHU to keep plumbing lines from freezing. When available, the operation ofthe VAV unit fan (series or parallel) remains unaffected.

Controller Flexibility

• 24VAC binary input that can be configured as a generic input or as occupancy input.When theDDC controller is operating with aTracer ™ SC, the status of the input is provided toTracer forits action. In stand-alone operation and when configured for an occupancy input, the input willcontrol occupancy status of the DDC controller.

• Auxiliary temperature analog input configured for an auxiliary temperature sensor. Whensensor is mounted in the supply air duct, the value of the input is used as status-only byTracerSC ifTracer SC is providing a supply air temperature to the DDC controller. Otherwise, the inputwill be used for determining heating/cooling control action of theVAV unit.When the auxiliarytemperature sensor is located in the discharge of the unit, and attached to aTraneTracer SCBAS, additional test sequencing and reporting is available to maximizeVAV system capabilitiesand simplify system commissioning.

• Dual-duct support with two DDC controllers. One DDC controller controls the cooling air valveand the other controller controls the heating air valve. With constant-volume sequences, thedischarge air volume is held constant by controlling discharge air volume with the heatingController.

• Tracer™ UC400 or UC210 Programmable BACnet Controller certified performance ensures thataTrane VAV with controller will provide state-of-the-art, consistent open communicationprotocol for integration with the industry’s latest (Non-Trane) building automation controlsystems, including Johnson Control, Andover, Siemans, Honeywell, etc.

• CO2 demand controlled ventilation enables a HVAC system to adjust ventilation flow based oncritical zone, average CO2 of specified zones, etc.Trane demand controlled ventilationstrategies are pre-defined for simplified application and can be easily customized to meet theneeds of a specific system.

Trane DDC VAV Controller Logic

Control Logic

Direct Digital Control (DDC) controllers are today’s industry standard. DDC controllers sharesystem-level data to optimize system performance (including changing ventilation requirements,system static pressures, supply air temperatures, etc.). Variables available via a simple twisted-shielded wire pair include occupied/unoccupied status, minimum and maximum airflow setpoints,zone temperature and temperature setpoints, air valve position, airflow cfm, fan status (on or off),fan operation mode (parallel or series), reheat status (on or off), VAV unit type, air valve size,temperature correction offsets, flow correction values, ventilation fraction, etc.

With the advent ofTracer UC400 open protocol, the most reliable VAV controller is now availablefor ANY system. Gone are the days of being locked into a single supplier.Trane DDC controllersprovideTrane-designed solid-state electronics intended specifically forVAV applications including:

1. SpaceTemperature Control

2. Ventilation Flow Control (100% outside air applications)

3. FlowTracking Space Pressurization Control (New feature)

VAV-PRC011-EN 77

DDC Controls


SpaceTemperature Control

Space temperature control applications are whereTrane emerged as an industry leader in qualityand reliability.This did not occur overnight and has continued to improve as our controller andcontrol logic has improved over time. STC employs controller logic designed to modulate thesupply airstream and associated reheat (either local or remote) to exactly match the loadrequirements of the space.

Additionally, minimum and maximum airflow and specific controller sequence requirements arepre-programmed to ensure that appropriate ventilation standards are consistently maintained.When connected to aTraneTracer™ SC control system, trend logging, remote alarming, etc. areavailable to fully utilize the power and capabilities of your systems.

General Operation-Cooling

In cooling control action, the DDC controller matches primary airflow to cooling load.The DDCcontroller will automatically change over to heating control action if the supply air temperature isabove a configured/editable setpoint. When the supply air temperature is less than 10 degreesbelow this setpoint, the controller will automatically switch to cooling control action.The DDCcontroller first chooses theTracer SC -provided supply air temperature value to use for autochangeover. If this is not available, it uses the temperature provided by the optional auxiliarytemperature sensor (must be installed for inlet temperature monitoring). If this is also not available,it uses the heating/cooling mode assigned byTracer SC or the DDC controller’s service tool.

General Operation-Reheat

In heating control action, the DDC controller matches primary airflow to heating load.The DDCcontroller will automatically change over to heating control action if the supply air temperature isabove a configured/editable setpoint. When the supply air temperature is less than 10 degreesbelow this setpoint, the controller will automatically switch to cooling control action. The DDCcontroller first chooses theTracer SC-provided supply air temperature value to use for autochangeover. If this is not available, it uses the temperature provided by the optional auxiliarytemperature sensor (must be installed for inlet temperature monitoring). If this is also not available,it uses the heating/cooling mode assigned byTracer SC or the DDC controller’s service tool.

When heat is added to the primary air, the air is considered reheated. Reheat can be either local(integral to theVAV unit in the form of an electric coil or hot water coil) or remote (typically existing

Figure 3. Flow sensor single vs. airflow delivery

0.01

0.1

1

5

10 100 1,000 10,000Cfm

Flow

Sens

orDP

(In.w

g)4" 12"

10"8"6"5"

14"

16"

78 VAV-PRC011-EN

DDC Controls

wall fin radiation, convector, etc.) or any combination of local and remote.The operatingcharacteristics of the four basic types of VariTrane DDC terminal reheat are discussed.


Three stages of on/off hot water reheat are available.Two-position water valves complete the HWreheat system and are either fully opened or fully closed.The heating minimum airflow setpointis enforced during reheat.



Proportional hot water reheat uses 3-wire floating-point-actuator technology.The heatingminimum airflow setpoint is enforced during reheat.

The water valve opens as space temperature drops below the heating setpoint. A separate reheatproportional-plus-integral control loop from that controlling airflow into the room is enforced.Water valve position is dependent on the degree that the space temperature is below the activeheating setpoint and the time that the space temperature has been below the active heatingsetpoint. If not already closed, the water valve fully closes when the zone temperature rises abovethe active heating setpoint by 0.5 °F (0.28 °C). An additional on/off remote heat output is availableand energized when the proportional valve is driven 100% open and de-energized when theproportional valve reaches 50% open.When reheat is de-energized, the cooling minimum airflowsetpoint is activated. Again, these reheat devices can be either local or remote.


One, two, or three stages of staged electric reheat are available.The heating minimum airflowsetpoint is enforced during reheat.



One to three stages of pulse-width modulation of electric heat are available. Energizing for aportion of a three-minute time period modulates the electric heater.This allows exact loadmatching for energy efficient operation, and optimum zone temperature control.The heatingminimum airflow setpoint is enforced during reheat.

The amount of reheat supplied is dependent on both the degree that the space temperature isbelow the active heating setpoint and the time that the space temperature has been below theactive heating setpoint. If not already off, reheat de-energizes when the zone temperature risesmore than 0.5°F (0.28°C) above the heating setpoint.


VAV-PRC011-EN 79

DDC Controls

Stage 2 uses the same “on” time logic as stage 1 listed above, except stage 1 is always energized.For example, when 75% of unit capacity is required, stage 1 is energized continuously, and stage2 is on for 90 seconds and off for 90 seconds. When reheat is de-energized, the cooling minimumairflow setpoint is activated. Caution: Care should be taken when sizing electric heaters. Leavingair temperatures (LAT) should not exceed 100°–110°F, with 95°F being the optimal for zonetemperature and comfort control. At elevated LATs, room stratification may result in uneven airdistribution and zone temperature complaints.To prevent stratification, the warm air temperatureshould not be more than 20°F (6.7°C) above zone air temperature. (See Diffuser, “D”, section foradditional application details)

Ventilation Control

Ventilation control enhances the usability ofTrane DDC controllers in more select applications thatrequire measurement of outside air (ventilation). Ventilation control is designed for use withconstant volume single-ductVAV units which modulate the primary damper and associated reheatto maintain an average constant discharge air temperature.The reheat is modulated to providedischarge air temperature consistent with AHU supply air temperature (typically 50º–60ºF).This iscritical to ensure that ASHRAE Standard 62 Ventilation standards are attained, consistentlymaintained, and monitored. When connected to aTracer™ building automation control system,trend logging, remote alarming, etc. is available. In fact, theTraneTracer Control System canprovide unmatched “peace of mind” by calling/paging the appropriate person(s) when specificalarms occur.

FlowTracking Control

This enhanced VAV DDC controller feature allows twoTrane VV550 controllers to coordinatemodulation simultaneously.This allows a specific CFM offset to be maintained.The CFM offsetprovides pressurization control of an occupied space, while maintaining the comfort and energysavings of a VAV system. A flow tracking system in a given zone consists of a standard SpaceComfort Control VAV (see B)unit plus a single-duct, cooling-only, exhaust VAV unit (see C). As thesupplyVAV unit modulates the supply airflow through the air valve to maintain space comfort, theexhaust box modulates a similar amount to maintain the required CFM differential.This is a simple,reliable means of pressurization control, which meets the requirements of the majority of zonepressurization control applications.Typical applications include:

• School and University laboratories

• Industrial laboratories

• Hospital operating rooms

• Hospital patient rooms

• Research and Development facilities

• And many more…

The CFM offset is assured and can be monitored and documented when connected to aTraneTracer BuildingAutomation System. FlowTracking Control is designed to meet most pressurizationcontrol projects. If an application calls for pressure control other than flow tracking, contact yourlocalTrane Sales Office for technical support.

80 VAV-PRC011-EN

DDC Controls

Tracer™ UC400 Programmable BACnet Controller—Unit Control Module

TheTracer UC400 direct digital controller Unit Control Module (DDC-UCM) is a microprocessor-based terminal unit with non-volatile memory which provides accurate airflow and roomtemperature control ofTrane and non-TraneVAV air terminal units.Tracer UC400 provides a simpleopen protocol to allow integration ofTrane VAV units and controls into other existing controlsystems.The UCM can operate in pressure-independent or pressure-dependent mode and uses aproportional plus integral control algorithm.

The controller monitors zone temperature setpoints, zone temperature and its rate of change andvalve airflow (via flow ring differential pressure).The controller also accepts an auxiliary ducttemperature sensor input or a supply air temperature value fromTracer SC. Staged electric heat,pulse width modulated electric heat, proportional hot water heat or on/off hot water heat controlare provided when required.The control board operates using 24-VAC power.TheTracer UC400is also a member of theTrane Integrated Comfort™ systems (ICS) family of products. When usedwith aTraneTracer™ SC or otherTrane controllers, zone grouping and unit diagnostic informationcan be obtained. Also part of ICS is the factory-commissioning of parameters specified by theengineer (see "Factory-Installed vs. Factory-Commissioned" in the Features and Benefits sectionfor more details).

Specifications

Supply Voltage

24 VAC, 50/60 Hz

Maximum VA Load

No Heat or Fan

8 VA (Board,Transducer, Zone Sensor, and Actuator)

Note: If using field-installed heat, 24 VAC transformer should be sized for additional load.

Figure 4. How does it operate?

B

A

C

Exhaust

Communication link

Supply VAVTo other VAVs orMain Control Panel

How Does It Operate?

T

Primary Airfrom MainAHU

Occupied Space

VAV-PRC011-EN 81

DDC Controls

Output Ratings

Actuator Output:24 VAC at 12 VA1st Stage Reheat:24 VAC at 12 VA2nd Stage Reheat:24 VAC at 12 VA3rd Stage Reheat:24 VAC at 12 VA

Binary Input

24 VAC, occupancy or generic.

Auxiliary Input

Can be configured for discharge or primary air temperature sensor.

Operating Environment

32 to 140°F, (0 to 60°C)5% to 95% RH, Non-condensing

Storage Environment

-40 to 180°F (-40 to 82.2°C),5% to 95%RH, Non-Condensing

Physical Dimensions

Width: 5.5" (139.7 mm)Length: 4.5" (69.85 mm)Height: 2.0" (44.45 mm)

Connections

1/4" (6.35 mm) Stab Connections

Communications

Tracer UC400– Space Comfort Control (SCC) profile with FTT-10 transceiver.

22 awg. unshielded level 4 communication wire.

Fan Control

Series fan: On unless unoccupied and min. flow has been released.Parallel fan: On when zone temperature is less than heating setpoint plus fan offset. Off when zonetemperature is more than heating setpoint plus fan offset plus 0.5°F (0.28°C).

Heat Staging

Staged electric or hot water proportional or pulse-width modulation.

82 VAV-PRC011-EN

DDC Controls

Trane LonMark™ DDC VAV Controller

Introduction

This LonMark™ certified controller uses the Space Comfort Controller (SCC) profile to exchangeinformation over a LonTalk™ network. Networks with LonMark certified controllers provide thelatest open protocol technology. Being LonMark certified guarantees that owners and end-usershave the capability of addingTrane products to other “open” systems and relieves owners of thepressure and expense of being locked into a single DDC supplier.TheTrane VV550 VAV controllerwith VariTrane VAV units can be applied to more than justTrane systems. When a customer buysaTrane VAV unit withTrane DDC controller, they take advantage of:

• Factory-commissioned quality

• Knowing they have selected the most reliable VAV controllers in the industry

• Trane as a single source to solve any VAV equipment, or system-related issues

• The most educated and thorough factory service technicians in the controls industry

• Over 150 local parts centers throughout North America that can provide what you need, whenyou need it.

Don’t let your existing controls supplier lock you out of the most recognized name in VAV systemcontrol in the industry. SpecifyTrane open-protocol systems.

What are the new features of this controller? Read on to find out more.

General Features and Benefits

Assured Accuracy

• Proportional-plus-integral control loop algorithm for determining required airflow needed tocontrol room temperature. Airflow is limited by active minimum and maximum airflowsetpoints.

• Pressure-independent (PI) operation that automatically adjusts valve position to maintainrequired airflow. In certain low-flow situations or in cases where the flow measurement hasfailed, the DDC controller will operate in a pressure-dependent (PD) mode of operation.

• When combined with the patentedTrane Flow ring and pressure transducer, flow is repeatableto +/- 5% accuracy across the Pressure Independent (PI) flow range. (See Valve/ControllerAirflow Guidelines section).

• Improved 2-Point Air Balancing is available – Assures optimized flow-sensing accuracy acrossthe operating range.This provides a more accurate airflow balancing method when comparedto typical single-point flow correction air balancing.

• Analog input resolution of +/- 1/8°F within the comfort range maximizes zone temperaturecontrol yielding excellent comfort control.

Reliable Operation

• Built for life –Trane products are designed to stand the test of time, with a proven design lifethat exceeds 20 years.

• Fully factory tested – fully screened and configured at the factory. All features are testedincluding fan and reheat stage energization, air valve modulation, and controller inputs andoutputs.

Safe Operation

• All components, including the controller, pressure transducer, transformer, etc. are mountedin a NEMA 1 sheet metal enclosure and are tested as an assembly to UL1995 standards.Theresult is a rugged and safe VAV, controller, and thus, overall unit.

• When in PI-mode, EH is disabled when the sensed flow is below the minimum required.

VAV-PRC011-EN 83

DDC Controls

• HW coilVAV units in ventilation flow control (VFC) have a Freeze protection algorithm to protectthe water coil and the internal space from water damage.This is accomplished by driving thewater valve to maximum position on alarm conditions.

System-Level Optimization

Trane controllers are designed to integrate intoTraneTracer SC and leverage clear and clean unit-controller related data for system level control decisions. Integrating aTraneVV550 controller intoaTracer SC Control System provides the next step in building system control.

Specifically, system-level decisions on how to operate all components can be made. Energyefficient optimization strategies like Static Pressure Optimization, Ventilation Reset, and CO2Demand-controlledVentilation can be employed with the simple press of a button.The end-resultis the most efficient and reliable building control system available.

Simplified Installation

Factory Commissioned Quality – AllTrane DDC VAV controllers are factory-commissioned.Thismeans that the DDC boards are powered and run-tested with your specific sequence parameters.They are connected to a communication link to make sure that information and diagnostic datafunction properly. Before any VariTrane VAV unit ships they must pass a rigorous quality controlprocedure.You can be assured that aTrane VAV unit withTrane DDC VAV controls will work rightout of the crate.

Zone sensor air balance – When applied to aTrane zone sensor with thumbwheel and on/cancelbuttons, a balancing contractor can drive the primary air valve to maximum or minimum airflowfrom the sensor to determine the point of calibration to be used (maximum will result in optimumperformance).The flow reading can then be calibrated from the sensor, without the use ofadditional service tools. (Non-LCD versions)

Tenant-Finish Heat Mode – In some office projects, the building is being constructed as tenants arebeing identified.Tenant-finish heat mode is designed for applications when a given floor has notbeen occupied.The main AHU system is used for heat and because the internal furnishings are notcomplete, the sensors have not been installed. In this case, the primary valve drives open usingthe heat of the main AHU to keep plumbing lines from freezing. When available, the operation ofthe VAV unit fan (series or parallel) remains unaffected.

Controller Flexibility

• 24VAC binary input that can be configured as a generic input or as occupancy input.When theDDC controller is operating withTracer SC, the status of the input is provided toTracer for itsaction. In stand-alone operation and when configured for an occupancy input, the input willcontrol occupancy status of the DDC controller.

• Auxiliary temperature analog input configured for an auxiliary temperature sensor. Whensensor is mounted in the supply air duct, the value of the input is used as status-only byTracerSC ifTracer SC is providing a supply air temperature to the DDC controller. Otherwise, the inputwill be used for determining heating/cooling control action of theVAV unit.When the auxiliarytemperature sensor is located in the discharge of the unit, and attached to aTrane SC BAS,additional test sequencing and reporting is available to maximizeVAV system capabilities andsimplify system commissioning.

• Dual-duct support with two DDC controllers. One DDC controller controls the cooling air valveand the other controller controls the heating air valve. With constant-volume sequences, thedischarge air volume is held constant by controlling discharge air volume with the heatingController.

• LonMark certified performance ensures that aTrane VAV with controller will provide state-of-the-art, consistent open communication protocol for integration with the industry’s latest (Non-Trane) building automation control systems, including Johnson Control, Andover, Siemans,Honeywell, etc.

84 VAV-PRC011-EN

DDC Controls

• CO2 demand controlled ventilation enables a HVAC system to adjust ventilation flow based oncritical zone, average CO2 of specified zones, etc.Trane demand controlled ventilationstrategies are pre-defined for simplified application and can be easily customized to meet theneeds of a specific system.

Trane DDC VAV Controller Logic

Control Logic

Direct Digital Control (DDC) controllers are today’s industry standard. DDC controllers sharesystem-level data to optimize system performance (including changing ventilation requirements,system static pressures, supply air temperatures, etc.). Variables available via a simple twisted-shielded wire pair include occupied/unoccupied status, minimum and maximum airflow setpoints,zone temperature and temperature setpoints, air valve position, airflow cfm, fan status (on or off),fan operation mode (parallel or series), reheat status (on or off), VAV unit type, air valve size,temperature correction offsets, flow correction values, ventilation fraction, etc.

With the advent of LonMark open protocol, the most reliable VAV controller is now available forANY system. Gone are the days of being locked into a single supplier.Trane DDC controllersprovideTrane-designed solid-state electronics intended specifically forVAV applications including:

4. SpaceTemperature Control

5. Ventilation Flow Control (100% outside air applications)

6. FlowTracking Space Pressurization Control (New feature)


SpaceTemperature Control

Space temperature control applications are whereTrane emerged as an industry leader in qualityand reliability.This did not occur overnight and has continued to improve as our controller andcontrol logic has improved over time. STC employs controller logic designed to modulate thesupply airstream and associated reheat (either local or remote) to exactly match the loadrequirements of the space.

Additionally, minimum and maximum airflow and specific controller sequence requirements arepre-programmed to ensure that appropriate ventilation standards are consistently maintained.When connected to aTraneTracer SC control system, trend logging, remote alarming, etc. areavailable to fully utilize the power and capabilities of your systems.

Figure 5. Flow sensor single vs. airflow delivery

0.01

0.1

1

5

10 100 1,000 10,000Cfm

Flow

Sens

orDP

(In.w

g)

4" 12"10"

8"6"5"

14"

16"

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General Operation-Cooling

In cooling control action, the DDC controller matches primary airflow to cooling load.The DDCcontroller will automatically change over to heating control action if the supply air temperature isabove a configured/editable setpoint. When the supply air temperature is less than 10 degreesbelow this setpoint, the controller will automatically switch to cooling control action.The DDCcontroller first chooses theTracer SC -provided supply air temperature value to use for autochangeover. If this is not available, it uses the temperature provided by the optional auxiliarytemperature sensor (must be installed for inlet temperature monitoring). If this is also not available,it uses the heating/cooling mode assigned byTracer SC or the DDC controller’s service tool.

General Operation-Reheat

In heating control action, the DDC controller matches primary airflow to heating load.The DDCcontroller will automatically change over to heating control action if the supply air temperature isabove a configured/editable setpoint. When the supply air temperature is less than 10 degreesbelow this setpoint, the controller will automatically switch to cooling control action. The DDCcontroller first chooses theTracer SC -provided supply air temperature value to use for autochangeover. If this is not available, it uses the temperature provided by the optional auxiliarytemperature sensor (must be installed for inlet temperature monitoring). If this is also not available,it uses the heating/cooling mode assigned byTracer SC or the DDC controller’s service tool.

When heat is added to the primary air, the air is considered reheated. Reheat can be either local(integral to theVAV unit in the form of an electric coil or hot water coil) or remote (typically existingwall fin radiation, convector, etc.) or any combination of local and remote.The operatingcharacteristics of the four basic types of VariTrane DDC terminal reheat are discussed.


Three stages of on/off hot water reheat are available.Two-position water valves complete the HWreheat system and are either fully opened or fully closed.The heating minimum airflow setpointis enforced during reheat.



Proportional hot water reheat uses 3-wire floating-point-actuator technology.The heatingminimum airflow setpoint is enforced during reheat.

The water valve opens as space temperature drops below the heating setpoint. A separate reheatproportional-plus-integral control loop from that controlling airflow into the room is enforced.Water valve position is dependent on the degree that the space temperature is below the activeheating setpoint and the time that the space temperature has been below the active heatingsetpoint. If not already closed, the water valve fully closes when the zone temperature rises abovethe active heating setpoint by 0.5 °F (0.28 °C). An additional on/off remote heat output is availableand energized when the proportional valve is driven 100% open and de-energized when theproportional valve reaches 50% open.When reheat is de-energized, the cooling minimum airflowsetpoint is activated. Again, these reheat devices can be either local or remote.


One, two, or three stages of staged electric reheat are available.The heating minimum airflowsetpoint is enforced during reheat.

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One to three stages of pulse-width modulation of electric heat are available. Energizing for aportion of a three-minute time period modulates the electric heater.This allows exact loadmatching for energy efficient operation, and optimum zone temperature control.The heatingminimum airflow setpoint is enforced during reheat.

The amount of reheat supplied is dependent on both the degree that the space temperature isbelow the active heating setpoint and the time that the space temperature has been below theactive heating setpoint. If not already off, reheat de-energizes when the zone temperature risesmore than 0.5°F (0.28°C) above the heating setpoint.


Stage 2 uses the same “on” time logic as stage 1 listed above, except stage 1 is always energized.For example, when 75% of unit capacity is required, stage 1 is energized continuously, and stage2 is on for 90 seconds and off for 90 seconds. When reheat is de-energized, the cooling minimumairflow setpoint is activated. Caution: Care should be taken when sizing electric heaters. Leavingair temperatures (LAT) should not exceed 100°–110°F, with 95°F being the optimal for zonetemperature and comfort control. At elevated LATs, room stratification may result in uneven airdistribution and zone temperature complaints.To prevent stratification, the warm air temperatureshould not be more than 20°F (6.7°C) above zone air temperature. (See Diffuser, “D”, section foradditional application details)

Ventilation Control

Ventilation control enhances the usability ofTrane DDC controllers in more select applications thatrequire measurement of outside air (ventilation). Ventilation control is designed for use withconstant volume single-ductVAV units which modulate the primary damper and associated reheatto maintain an average constant discharge air temperature.The reheat is modulated to providedischarge air temperature consistent with AHU supply air temperature (typically 50º–60ºF).This iscritical to ensure that ASHRAE Standard 62 Ventilation standards are attained, consistentlymaintained, and monitored. When connected to aTrane Building Automation System controlsystem, trend logging, remote alarming, etc. is available. In fact, theTraneTracer Control Systemcan provide unmatched“peace of mind” by calling/paging the appropriate person(s) when specificalarms occur.

FlowTracking Control

This enhanced VAV DDC controller feature allows twoTrane VV550 controllers to coordinatemodulation simultaneously.This allows a specific CFM offset to be maintained.The CFM offsetprovides pressurization control of an occupied space, while maintaining the comfort and energysavings of a VAV system. A flow tracking system in a given zone consists of a standard SpaceComfort Control VAV (see B)unit plus a single-duct, cooling-only, exhaust VAV unit (see C). As thesupplyVAV unit modulates the supply airflow through the air valve to maintain space comfort, theexhaust box modulates a similar amount to maintain the required CFM differential.This is a simple,reliable means of pressurization control, which meets the requirements of the majority of zonepressurization control applications.Typical applications include:

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• School and University laboratories

• Industrial laboratories

• Hospital operating rooms

• Hospital patient rooms

• Research and Development facilities

• And many more…

The CFM offset is assured and can be monitored and documented when connected to aTraneTracer BuildingAutomation System. FlowTracking Control is designed to meet most pressurizationcontrol projects. If an application calls for pressure control other than flow tracking, contact yourlocalTrane Sales Office for technical support.

LonMark Direct Digital Controller—Unit Control Module

The controller monitors zone temperature setpoints, zone temperature and its rate of change andvalve airflow (via flow ring differential pressure).The controller also accepts an auxiliary ducttemperature sensor input or a supply air temperature value fromTracer™ SC. Staged electric heat,pulse width modulated electric heat, proportional hot water heat or on/off hot water heat controlare provided when required.The control board operates using 24-VAC power.TheTrane LonMark

Figure 6. How does it operate?

B

A

C

Exhaust

Communication link

Supply VAVTo other VAVs orMain Control Panel

How Does It Operate?

T

Primary Airfrom MainAHU

Occupied Space

TheTrane LonMark direct digital controller Unit Control Module (DDC-UCM)is a microprocessor-based terminal unit with non-volatile memory whichprovides accurate airflow and room temperature control ofTrane and non-Trane VAV air terminal units. LonMark provides a simple open protocol toallow integration ofTraneVAV units and controls into other existing controlsystems.The UCM can operate in pressure-independent or pressure-dependent mode and uses a proportional plus integral control algorithm.

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DDC-UCM is also a member of theTrane Integrated Comfort™ systems (ICS) family of products.When used with aTraneTracer SC or otherTrane controllers, zone grouping and unit diagnosticinformation can be obtained.Also part of ICS is the factory-commissioning of parameters specifiedby the engineer (see "Factory-Installed vs. Factory-Commissioned" in the Features and Benefitssection for more details).

Note: Trane LonMark DDC-UCM controllers can also take advantage of factory-commissionedquality on non-Trane systems through LonMark open protocol.

Specifications

Supply Voltage. 24 VAC, 50/60 Hz

Maximum VA Load.

No Heat or Fan. 8 VA (Board,Transducer, Zone Sensor, and Actuator)


Output Ratings.

Actuator Output:24 VAC at 12 VA1st Stage Reheat:24 VAC at 12 VA2nd Stage Reheat:24 VAC at 12 VA3rd Stage Reheat:24 VAC at 12 VA

Binary Input. 24 VAC, occupancy or generic.

Auxiliary Input. Can be configured for discharge or primary air temperature sensor.

Operating Environment.


Storage Environment.


Physical Dimensions.


Connections. 1/4" (6.35 mm) Stab Connections

Communications.

LonMark – Space Comfort Control (SCC) profile with FTT-10 transceiver.

22 awg. unshielded level 4 communication wire.

Fan Control.

Series fan: On unless unoccupied and min. flow has been released.Parallel fan: On when zone temperature is less than heating setpoint plus fan offset. Off when zonetemperature is more than heating setpoint plus fan offset plus 0.5°F (0.28°C).

Heat Staging. Staged electric or hot water proportional or pulse-width modulation

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Table 47, p. 90 provides an input listing forTracer VV550/551 VAV controllers, and Table 48, p. 90provides an output listing forTracer VV550/551 VAV controllers. Table 49, p. 91 provides theconfiguration properties for the controller.The content of the lists conforms to both the LonMarkSCC functional profile 8500 and the LonMark node object.

Table 47. Input listing

Input description Input SNVT type

Space temperature nviSpaceTemp SNVT_temp_p

Setpoint nviSetpoint SNVT_temp_p

Occupancy, schedule nviOccSchedule SNVT_tod_event

Occupancy, manual command nviOccManCmd SNVT_occupancy

Occupancy sensor nviOccSensor SNVT_occupancy

Application mode nviApplicMode SNVT_hvac_mode

Heat/cool mode input nviHeatCool SNVT_hvac_mode

Fan speed command nviFanSpeedCmd SNVT_switch

Auxiliary heat enable nviAuxHeatEnable SNVT_switch

Valve override nviValveOverride SNVT_hvac_overid

Flow override nviFlowOverride SNVT_hvac_overid

Emergency override nviEmergOverride SNVT_hvac_emerg

Source temperature nviSourceTemp SNVT_temp_p

Space CO2 nviSpaceCO2 SNVT_ppm

Clear alarms/diagnostics nviRequest(a) SNVT_obj_request

Air flow setpoint input nviAirFlowSetpt SNVT_flow

(a) Part of the node object

Table 48. Output listing

Output description Output SNVT type

Space temperature nvoSpaceTemp SNVT_temp_p

Unit status, mode nvoUnitStatus SNVT_hvac_status

Effective setpoint nvoEffectSetpt SNVT_temp_p

Effective occupancy nvoEffectOccup SNVT_occupancy

Heat cool mode nvoHeatCool SNVT_hvac_mode

Setpoint nvoSetpoint SNVT_temp_p

Discharge air temperature nvoDischAirTemp SNVT_temp_p

Space CO2 nvoSpaceCO2 SNVT_ppm

Effective air flow setpoint nvoEffectFlowSP SNVT_flow

Air flow nvoAirFlow SNVT_flow

File table address nvoFileDirectory(a) SNVT_address

Object status nvoStatus(a) SNVT_obj_status

Alarm message nvoAlarmMessage SNVT_str_asc

(a) Part of the node object.

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Table 49. Configuration properties

Configuration property description Configuration property SNVT type SCPT reference

Send heartbeat nciSndHrtBt SNVT_time_sec SCPTmaxSendTime (49)

Occ temperature setpoints nciSetpoints SNVT_temp_setpt SCPTsetPnts (60)

Minimum send time nciMinOutTm SNVT_time_sec SCPTminSendTime (52)

Receive heartbeat nciRecHrtBt SNVT_time_sec SCPTmaxRcvTime (48)

Location label nciLocation SNVT_str_asc SCPTlocation (17)

Local bypass time nciBypassTime SNVT_time_min SCPTbypassTime (34)

Manual override time nciManualTime SNVT_time_min SCPTmanOverTime (35)

Space CO2 limit nciSpaceCO2Lim SNVT_ppm SCPTlimitCO2 (42)

Nominal air flow nciNomFlow SNVT_flow SCPTnomAirFlow (57)

Air flow measurement gain nciFlowGain SNVT_multiplier SCPTsensConstVAV (67)

Minimum air flow nciMinFlow SNVT_flow SCPTminFlow (54)

Maximum air flow nciMaxFlow SNVT_flow SCPTmaxFlow (51)

Minimum air flow for heat nciMinFlowHeat SNVT_flow SCPTminFlowHeat (55)

Maximum air flow for heat nciMaxFlowHeat SNVT_flow SCPTmaxFlowHeat (37)

Minimum flow for standby nciMinFlowStdby SNVT_flow SCPTminFlowStby (56)

Firmware major version nciDevMajVer(a) n/a SCPTdevMajVer (165)

Firmware minor version nciDevMinVer(a) n/a SCPTdevMinVer (166)

Flow offset for tracking applications nciFlowOffset SNVT_flow_f SCPToffsetFlow (265)

Local heating minimum air flow nciMinFlowUnitHt SNVT_flow SCPTminFlowUnitHeat (270)

Minimum flow for standby heat nciMnFlowStbyHt SVNT_flow SCPTminFlowStbyHeat(263)

(a) Part of the node object.

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Direct Digital Controller—Unit Control Module

The controller also accepts an auxiliary duct temperature sensor input or a supply air temperaturevalue fromTracer™ SC. Staged electric heat, pulse width modulated electric heat, proportional hotwater heat or on/off hot water heat control are provided when required.The control board operatesusing 24-VAC power.TheTrane DDC-UCM is a member of theTrane Integrated Comfort™ systems(ICS) family of products. When used with aTraneTracer SC building management controller orotherTrane controllers, zone grouping and unit diagnostic information can be obtained. Also partof ICS is the factory-commissioning of parameters specified by the engineer (see "Factory-Installedvs. Factory-Commissioned" in the Features and Benefits section for more details).

Specifications

Supply Voltage

24 VAC, 50/60 Hz

Maximum VA Load

No Heat or Fan

12 VA (Board,Transducer, Zone Sensor, and Actuator)


Output Ratings

Actuator Output: 24 VAC at 12 VA1st Stage Reheat: 24 VAC at 12 VA2nd Stage Reheat: 24 VAC at 12 VA3rd Stage Reheat: 24 VAC at 12 VA

Binary Input

24 VAC

Auxiliary Input

Can be configured for an optional 2–10 VDC CO2 sensor, or auxiliary temperature sensor.

Operating Environment:


Storage Environment


TheTrane direct digital controller Unit ControlModule (DDC-UCM) is a microprocessor-basedterminal unit with non-volatile memory whichprovides accurate airflow and room temperaturecontrol ofTrane VAV air terminal units.The UCM canoperate in a pressure-independent or a pressure-dependent mode and uses a proportional plusintegral control algorithm.The controller monitorszone temperature setpoints, zone temperature and itsrate of change and valve airflow (via flow ringdifferential pressure).

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Physical Dimensions


Connections

1/4" (6.35 mm) Stab Connections

Communications

RS-485; Stranded wire, twisted pair, shielded, copper conductor only, 18–20 awg

Fan Control

• Series fan: On unless unoccupied and min. flow has been released.

• Parallel fan: On when zone temperature is less than heating setpoint plus fan offset. Off whenzone temperature is more than heating setpoint plus fan offset plus 0.5°F (0.28°C).

Heat Staging

Staged electric or hot water proportional or pulse-width modulation

Wireless Comm Interface (WCI)

Quantity of WCIs per Network

EachTrane wireless network can have a total of 31WCIs (30 memberWCIs plus 1 coordinatorWCI).Each network requires one WCI to function as network coordinator.

Quantity of Networks perTracer SC

ATracer SC can support up to 8 wireless networks.

Automatic Network Formation

When a WCI is connected to aTracer SC, it is auto-assigned as the coordinator.To enable thecoordinator,Tracer SC must be configured for wireless communication.The coordinator WCIopens the network to allow allWCIs having matching addresses to automatically join the network.

If noTracer SC is present, a centrally locatedWCI must be designated to act as the coordinator.Youcan manually set the coordinator WCI so all WCIs having matching addresses automatically jointhe network.

Wireless Zone Sensors

The WCI also communicates withTrane wireless zone sensors, eliminating the need for analogreceivers.

Wired Zone Sensors

Systems using Wireless Comm can also use wired zone sensors.

WCI controller

TheTrane® Wireless Comm Interface (WCI) enables wirelesscommunication between system controls, unit controls, andwireless sensors for the new generation ofTrane controlproducts.The WCI replaces the need for communication wirein all system applications.

Note: See BAS-SVX40A-EN, Installation, Operation andMaintenance, Wireless Comm for more information.

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Dimensions

Specifications

OperatingTemperature

-40 to 158ºF (-40 to 70ºC)

Storage temperature

-40 to 185ºF (-40 to 85°C)

Storage and operating humidity range

5% to 95% relative humidity (RH), non-condensing

Voltage

24 Vac/Vdc nominal ± 10%. If using 24 Vac, polarity must be maintained.

Receiver power consumption

<2.5 VA

Housing material

Polycarbonate/ABS (suitable for plenum mounting), UV protected, UL 94: 5VA flammability rating

Mounting

3.2 in (83 mm) with 2 supplied mounting screws

Range

Open range: 2,500 ft (762 m) with packet error rate of 2%

Indoor:Typical range is 200 ft (61 mm); actual range is dependent on the environment. See BAS-SVX55 for more detail.

Note: Range values are estimated transmission distances for satisfactory operation. Actualdistance is job specific and must be determined during site evaluation. Placement of WCIis critical to proper system operation. In most general office space installations, distance isnot the limiting factor for proper signal quality. Signal quality is ffected by walls, barriers,and general clutter. For more information os available at http://www.trane.com.

2.896 in (73.55 mm)

0.118 in(3.00 mm)

4.677 in (118.8 mm)

3.385 in (86.0 mm)

2.480 in (63.0 mm)

R0.71 in (R1.80 mm) TYP

0.236 in(6.0 mm)

1.344 in (34.14 mm)

1.419 in (36.03 mm)

0.650 in (16.50 mm)

2.62 in (66.55 mm)

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Output power

North America: 100 mW

Radio frequency

2.4 GHz (IEEE Std 802.15.4-2003 compliant) (2405–2480 MHz, 5 MHz spacing)

Radio channels

16

Address range

Group 0–8, Network 1–9

Mounting

Fits a standard 2 in. by 4 in. junction box (vertical mount only). Mounting holes are spaced 3.2 in.(83 mm) apart on vertical center line. Includes mounting screws for junction box or wall anchorsfor sheet-rock walls. Overall dimensions: 2.9 in. (74 mm) by 4.7 in. (119 mm)

Wireless protocol

ZigBee PRO—ZigBee Building Automation Profile, ANSI/ASHRAE Standard 135-2008 Addendumq (BACnet™/ZigBee)

Wireless Receiver/Wireless Zone Sensor

The spread spectrum receiver/translator can be field or factory installed and functions as acommunication translator between spread spectrum radio communications and the VAVcommunications link.

Specifications

Power Requirements

Receiver: 24 V nominal AC/DC ± 10% < 1VA

Zone Sensor: (2) AA lithium batteries

Sensor Operating Environments

32 to 122°F, (0 to 50°C)5 to 95%RH, Non-condensing

Receiver Operating Environments

-40 to 158°F, (-40 to 70°C)5 to 95%RH, Non-condensing

The wireless zone sensor system eliminates thewiring problems associated with VAV temperaturesensors. It provides the flexibility to move zonesensors after the occupants have revised the spacefloor plan layout.The zone sensor houses the spacetemperature sensor, local setpoint adjustmentthumbwheel, OCCUPIED/UNOCCUPIED button,battery life, signal strength indicators, and spreadspectrum transmitter.

VAV-PRC011-EN 95

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Storage Environment—Sensor/Receiver

-40 to 185°F, (-40 to 85°C)5 to 95%RH, Non-condensing

Mounting

Receiver: Suitable for mounting above or below ceiling grid. Requires 24 V power. Factoryinstalled receiver comes mounted to the VAV unit with power provided by associated unitcontroller transformer. Field installed option provided with associated wire harness for similarpower and communication connection.

Sensor: Mounts to a 2x4 handi-box or directly to the wall by attaching the backplate and thensnapping the sensor body into place.

Dimensions

DDC Zone Sensor

Specifications

Thermistor Resistance Rating

10,000 Ohms at 77°F (25°C)

Setpoint Resistance Rating

Setpoint potentiometer is calibrated to produce 500 Ohms at a setting of 70°F (21.11°C)

Electrical Connections

Terminal Block – Pressure ConnectionsCommunications Jack – WE-616 (available for field installation)

Physical Dimensions

Width: 2.75" (69.85 mm)Height: 4.5" (114.3 mm)Depth: 1.0" (25.4 mm)

Receiver/Translator

Enclosure: Plastic

Height: 4.75" (120.6 mm)

Width: 2.90" (73.5 mm)

Depth: 1.08" (27.5 mm)

Sensor/Transmitter

Enclosure: Plastic

Height: 4.78" (121.4 mm)

Width: 2.90" (73.5 mm)

Depth: 1.08" (27.5 mm)

The DDC zone sensor is used in conjunction with theTrane direct digital controller to sense the spacetemperature and to allow for user adjustment of thezone setpoint. Models with external zone setpointadjustments and occupied mode overridepushbuttons are available.

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CO2Wall Sensor and Duct CO2 Sensor

The wall- and duct-mounted carbon dioxide (CO2) sensors are designed for use withTrane DDC/UCM control systems. Installation is made simple by attachment directly to the DDC/ UCMcontroller.This allows the existing communication link to be used to send CO2 data to the higher-levelTrane control system.

Wall-mounted sensors can monitor individual zones, and the duct-mounted sensor is ideal formonitoring return air of a given unit. Long-term stability and reliability are assured with advancedsilicon based Non-Dispersive Infrared (NDIR) technology.

When connected to a building automation system with the appropriate ventilation equipment, theTrane CO2 sensors measure and record carbon dioxide in parts-per-million (ppm) in occupiedbuilding spaces.These carbon dioxide measurements are typically used to identify under-ventilated building zones and to override outdoor airflow beyond design ventilation rates if the CO2exceeds acceptable levels.

Specifications

Measuring Range0–2000 parts per million (ppm)

Accuracy at 77°F (25°C)< ± (40 ppm CO2 + 3% of reading) (Wall only)

< ± (30 ppm CO2 + 3% of reading)

Recommended calibration interval

5 years

ResponseTime

1 minute (0–63%)


59 to 95°F (15 to 35°C) (Wall only)

23 to 113°F (-5 to 45°C)

StorageTemperature

-4 to 158°F (-20 to 70°C)

Humidity Range

0–85% relative humidity (RH)

Output Signal (jumper selectable)

4-20 mA, 0–20 mA,0–10 VDC

Figure 7. CO2 wall sensor (L) and duct CO2 sensor (R)

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Resolution of Analog Outputs

10 ppm CO2

Power Supply

Nominal 24 VAC

Power Consumption

<5 VA

Housing Material

ABS plastic

Dimensions

4 1/4" x 3 1/8" x 1 7/16" (Wall only)(108 mm x 80 mm x 36 mm) (Wall only)

3 1/8" x 3 1/8" x 7 ¾"(80 mm x 80 mm x 200 mm)

DDC Zone Sensor with LCD

Specifications

Thermistor Resistance Rating

10,000 Ohms at 77°F (25oC)

Setpoint Resistance Rating

Setpoint potentiometer is calibrated to produce 500 Ohms at a setting of 70oF (21.11oC)

Temperature Range

Displays 40 to 99oF (5 to 35oC)With Setpoints 50 to 90oF (10 to 32oC)


Terminal Block – Pressure ConnectionsCommunication Jack – WE – 6164 VA maximum power input.

Physical Dimensions


The DDC zone sensor with LCD has the look and functionality of thestandardTrane DDC zone sensor but has a LCD display.The sensorincludes setpoint adjustment, the display of the ambient temperature, acommunication jack, and occupied mode override pushbuttons. Also, itcan be configured in the field for either a Fahrenheit or Celsius display, acontinuous display of the setpoint and the offset of displayedtemperatures.

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Zone Occupancy Sensor

Sensor ships with 30-minute time delay pre-set from the factory.Time delay and sensitivity can befield-adjusted.

Specifications

Power Supply

24 VAC or 24 VDC, ± 10%

Maximum VA Load

0.88 VA @ 24 VAC,0.72 VA @ 24 VDC

Isolated Relay Rating

1 A @ 24 VAC or 24 VDC


32 to 131°F (0 to 55°C)

StorageTemperature

-22 to 176°F (-30 to 80°C)

Humidity Range

0 to 95% non-condensing

Effective Coverage Area

1200 sq ft

Effective Coverage Radius

22 feet

Housing Material

ABS Plastic

Dimensions

3.3" dia. x 2.2" deep (85 mm x 56 mm). Protrudes 0.36" (9 mm) from ceiling when installed.

The zone occupancy sensor is ideal for spaces with intermittent occupancy.It is connected to theTrane DDC UCM and allows the zone to shift tounoccupied setpoints for energy savings when movement is not detectedin the space.

The zone occupancy sensor has a multi-cell, multi-tier lens with amaximum field of view of 360°.The maximum coverage area of the sensoris 1200 square feet with a maximum radius of 22 feet from the sensor whenmounted at 8 feet above the floor.

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Factory or Field Mounted AuxiliaryTemperature Sensor

Factory or Field Mounted AuxiliaryTemperature Sensor

Sensing Element

Thermistor 10,000 Ohms @ 77°F (25°C)


-4 to 221°F (-20 to 105°C), 5%-95%RHNon-Condensing

Wiring Connection

8 ft 18 awg

Sleeving for wire leads is acyrlic #5 awg grade C rated @ 155°C

Probe Dimensions

3.4" long x 5/16" diameter(86 mm x 7.9 mm diameter)

Mounting

In any position on duct.

Mount the sensor to the duct using#10 x ¾" (19.05 mm) sheet metal screws.

The auxiliary temperature sensor is used in conjunction with theTrane DDCcontroller to sense duct temperature.When the DDC controller is used witha BuildingAutomation System, the sensor temperature is reported as statusonly. When the DDC control is used as stand alone configuration and thesensor is placed in the supply air duct, the sensor determines the controlaction of the UCM in a heat/cool changeover system.

When factory mounted, the sensor is terminated. If sensor is field mounted,it is shipped loose and is terminated in the field.

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Two-Position Water Valve

Specifications

Valve Design

Body: BrassCover: AluminumCase: Stainless Steel

Stem: Brass, Hard Chrome Plate“O” Ring Seals: VitonOperating Paddle: Buna N

Valve Body Ratings

UL 873 Listed File E27743

Plenum Rated CSA C22.2 No. 139Certified, File LR85083, Class 3221 01

Temperature Limits

200°F (93.33°C) Fluid104°F (40°C) Ambient

Maximum Operating Pressure

300 psi (2069 kPa)

Electrical Rating

Motor Voltage – 24 VAC, 50/60 Hz

Power Consumption – 7.0 VA of 24 VAC

Valve Offerings

All valves are spring returned.4.0 Cv – ½" (12.7 mm) O.D. NPT5.0 Cv – ¾" (19.1 mm) O.D. NPT8.0 Cv – 1" (25.4 mm) O.D. NPT

Cv offered (Close-off Pressure):Cv 3.0 (25) psi (172 kPa)Cv 4.0 (20) psi (138 kPa)Cv 8.00 (17) psi (117 kPa)

Two-position hot water valves are used withTrane DDC/UCM controls andanalog electronic controls. Valve actuation is by a hysteresis synchronousmotor.

All valves are field-installed and convertible from three-way to two-way bymeans of an included cap.

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Proportional Water Valve

The direct digital controller uses a time-based signal to drive the motor to its proper position.Whenpower is removed from the valve, it remains in its last controlled position.

Specifications

Valve Design:

Ball valve construction designed for chilled/hot water or water with up to 50% glycol

Temperature Limits

32 to 201°F (0 to 94°C) Fluid23 to 122°F (-5 to 50°C) Ambient

Rated Body Pressure

300 psi (2.06 mPa)

Maximum Actuator Close-Off Pressure

60 psi (0.4 mPa)

Electrical Rating

Motor Voltage – 24 VAC, 50/60 Hz

Power Consumption – 3.0 VA at 24 VAC

Valve Offerings

All valves are proportional control with ½" (12.7 mm) O.D. NPT connections

Cv offered:

0.7

2.7

6.6

8.0

The proportional water valve is used to provide accurate control of a hotwater heating coil to help maintain a zone temperature setpoint.The valveis a ball design and comes in available in four different flow capacities forproper controllability.The valves are field-adjustable for use as a two- orthree-way configuration.The valves ship in a two-way configuration with aplug that is installed loose in the bypass port. Conversion to three-wayoperation is accomplished by removing the plug from the "B" port.The valveactuator contains a three-wire synchronous motor.

102 VAV-PRC011-EN

DDC Controls

Differential PressureTransducer

Specifications

Input Pressure Range

0.0 to 5.0 in. wg(Maximum input pressure 5 psig)


32 to 140° F, (0 to 60°C)5% to 95% RH, Non-Condensing

Storage Environment

-40 to 180° F, (-40 to 82.2°C)5% to 95%RH, Non-condensing


Vin = 5.0 VDC nominal(4.75 to 5.25 VDC acceptable)Current Draw = 5 mA maximumNull Voltage = 0.250 VDC ± 0.06 VDCSpan = 3.75 VDC ± 0.08 VDC

Note: Null and Span are ratiometric with Vin

Physical Dimensions


Pressure Connections

1/8" (3.175 mm) barbed tubing connections

The differential pressure transducer is used in conjunction with theTranedirect digital controller and analog electronic controller.The pressuretransducer measures the difference between the high-pressure and low-pressure ports of theTrane flow ring. The transducer is self-adjusting tochanges in environmental temperature and humidity.

VAV-PRC011-EN 103

DDC Controls

Transformers

Specifications

Primary Voltage

120 VAC208 VAC240 VAC277 VAC347 VAC480 VAC575 VAC

Secondary Voltage

24 VAC

Power Rating

50 VA

Physical Dimensions

For all voltages:

The transformers will be no larger than the following dimensions:Width: 2.63" (66.7 mm)Length: 2.50" (63.5 mm)Height: 2.30" (58.4 mm)

The transformer converts primary power supply voltages to the voltagerequired by the direct digital controller and analog.The transformer alsoserves to isolate the controller from other controllers which may beconnected to the same power source.

104 VAV-PRC011-EN

DDC Controls

Trane Non-Spring Return Actuator

This actuator is used with DDC controls and retrofit kits. it is available with a 3-wire floating-pointcontrol device. It is a direct-coupled over the shaft (minimum shaft length of 2.1”), enabling it tobe mounted directly to the damper shaft without the need for connecting linkage.The actuator hasan external manual gear release to allow manual positioning of the damper when the actuator isnot powered.The actuator is Underwriters Laboratories Standard 873 and Canadian Standardsassociate Class 3221 02 certified as meeting correct safety requirements and recognized industrystandards.

Specifications

Actuator Design

3-wire, 24-AC floating-point control. Non-spring return.

Actuator Housing

Housing type - NEMA 1

Rotation Range

90° clockwise or counterclockwise

Electrical Rating

Power supply - 24VAC (20 to 30 VAC) at 50/60 Hz

Power Consumption - 1.8 VA maximum, Class 2

Electrical Connection

No. 6-32 screw terminals (For DD00 and FM01 control options and retrofit kits.)

6-pin female connector harness forTrane UCM (forTrane DDC controls except retrufit kits)

Manual Override

External clutch release lever

Shaft Requirement

1/2” round

2.1” length

Humidity

5% to 95% RH, Non-Condensing

Temperature Rating

Ambient operating: 32 to 125°F (0 to 52°C)

shipping and storage: -20 to 130°F (-29 to 66°C)

VAV-PRC011-EN 105

DDC Controls

Trane Spring Return Actuator

Specifications

Actuator Design

24-VAC, floating-point control. Spring return

Actuator Housing

HousingType-NEMA IP54

Rotation Range

Adjustable from 0° to 90° at 5° intervals, clockwise or counterclockwise

Electrical Rating

Power Supply – 24 VAC (19.2 to 28.8 VAC) at 50/60 Hz

Power Consumption – 4VA holding, 5VA running maximum, Class 2

Electrical Connection

6-pin female connector forTrane UCM (forTrane DDC controls)

Manual Override

Manual override key provided

Shaft requirement:¼" to ¾" round

2.1" length

Humidity

95% RH, Non-Condensing

Temperature Rating

Ambient operating: 32 to 130°F(0 to 54°C)

Shipping and storage: -40 to 158°F(-40 to 70°C)

Torque

62 in.-lbs (7N-m)

This actuator is used with DDC controls and is a floating-point controldevice. It is direct-coupled over the shaft (minimum shaft length of 2.1"),enabling it to be mounted directly to the damper shaft without the need forconnecting linkage.The actuator is Underwriters Laboratories Standard60730 and Canadian Standards Association C22.2 No. 24-93 certified asmeeting correct safety requirements and recognized industry standards.

106 VAV-PRC011-EN

DDC Controls

VariTrane™ DDC Retrofit Kit

AVariTrane DDC-UCM, an electronic differential pressure transducer, and a six-pin connector withwiring for an actuator, make up the assembly of the retrofit kit. All are housed inside a metalenclosure. For maximum flexibility, the kit is available with one of two actuators or without anactuator. If a kit is ordered without an actuator, ensure the actuator used has 24VAC three-wirefloating control. Other accessories are available with the retrofit kit which include zone sensors,flow bars (used with units without a flow sensor), power transformers, control relays, and E/Psolenoid valves.

Retrofit Kit Actuator

Specifications

Actuator Design

on-off/floating-point

Actuator housing

HousingType-NEMA type 1

Housing Material Rating- UL 94-5V

Direction of Rotation

Reverse wires terminals 2 and 3

Angle of Rotation

Max 95º, adjustable with mechanical stops

Electrical Rating

Power Supply – 24 VAC ± 20% 50/60 Hz 24 VDC ± 10%

Power Consumption – 2 W

Transformer Sizing – 3 VA (Class 2 power source)

Manual Override. External push button

The retrofit kit provides the system advantages ofVariTrane DDC controls tobuilding owners for existing systems.The kit can be applied whenconverting from pneumatic or analog controlled systems to a DDCcontrolled system.The kit may be used on existing single-duct units with hotwater and electric reheat (three stages), dual-duct units, and all fan-poweredunits (both series and parallel) with hot water and electric reheat (twostages).

This actuator is available with the DDC Retrofit Kit and is a 3-terminal,floating-point control device. It is direct-coupled over the damper shaft sothere is no need for connecting linkage.The actuator has an external manualgear release to allow manual positioning of the damper when the actuatoris not powered. A three-foot plenum-rated cable with bare ends will be sentseparately.The actuator is listed under Underwriters Laboratories Standard873, CSA 22.2 No. 24 certified, and CE manufactured per Quality StandardSO9001.

VAV-PRC011-EN 107

DDC Controls

Humidity

5% to 95% RH, Non-Condensing

AmbientTemperature

-22 to 122°F (-30C to 50°C)

Storage Environment

-40 to 176°F (-40 to 80°C)

Torque

Min 35 in.-lb (4Nm), Independent of load

RunningTime

95 sec. for 0 to 35 in-lb

Noise Rating

Less than 35 dB (A)

Weight

1.2 lbs (0.55 kg)

Static Pressure Controller

Specifications

Supply Voltage

24 VAC, 60 HZ

Maximum VA Load

No more than 12 VA

Recommended Wire Size

14 – 22 AWG Stranded

Housing Material

ABS

Components

Control boxPressure sensorInterconnecting wireStatic pressure tapFits standard 2" deep x 4" x 2 1/8" utility box.

TheTrane static pressure controller will sense duct static pressure andmodulate a relief device in an effort to limit maximum duct static pressure.An analog signal from the air probe is used to compare the difference in theduct static pressure and the duct static pressure setpoint.The relief devicecan be a VariTrane terminal or any blade damper device with thespecifications stated below. See VAV-EB-64 for installation and calibration.

108 VAV-PRC011-EN

DDC Controls

Electric Heater Silicon-Controlled Rectifier (SCR)

Specifications

• Microprocessor based burst-fire controller / SSR

• Low-voltage control

• Output status indicator

• 0-100% Control Range

• Synchronized triggering output (P3)

• 20 AC Cycles Base Period

Input Specifications DC Control

Supply Voltage Range (VDC) (P1) 8-28

Input Current Range [mA] 20-30

Nominal Input Impedance [Ohms] 30K

Control Voltage (a)[VDC][P4]

(a) Control voltage < 0.2 Vdc guarantees heat is turned off.

0-10

Nominal Input Impedance [ohms][P4] 20K

Output Status Functions LED

Initial Logic Supply On Flash Once

Load Voltage Missing / Load Open (W/ PLV = 0V) Flash Once Intermittenly

Load Voltage Missing / Load Open (W/ PLV > 0V) Flash Twice Intermittently

General Specifications Parameters

Dielectric Strength, Input/Output/Base (50/60Hz) 4000 Vrms

Minimum Insulation Resistance (@ 500 V DC) 109 Ohm

Maximum Capacitance, Input/Output 10 pF

Ambient Operating Temperature Range -20 to 80°C

Ambient Storage Temperature Range -40 to 125 °C

Encapsulation Thermally conductive Epoxy

Input connector Header Connector 3.5mm

Output Terminals Screws and Saddle Clamps Furnished, Installed

Output Max Wire Size Output:2 x AWG 8 (3.8mm)

Output Screws Maximum Torque 20 in lbs (2.2 Nm)

Assembly Specifications

Weight (typical) 1.38 Lb (0.628 Kg.)

Heat Transfer Material Used Thermal Pad

Material Steel

Finish Nickel Plate

Torque Applied 20 in/lbs ± 10%.

VAV-PRC011-EN 109

Pneumatic Controls

3011 Pneumatic Volume Regulator

Specifications

Differential Pressure Range

0-1 in. wg (0–249 Pa)

Minimum Setpoint Range

0-1 in. wg (0–249 Pa)

Maximum Setpoint Range

0.05 in. wg (12.5 Pa) above minimum to 1 in. wg (249 Pa) above minimum

Operating Static Pressure Range

0.25 in. wg—6.0 in. wg (62.3–1494 Pa)

Reset Pressure Span

Factory-set at 5 psig (34.5 kPa)Field-adjustable from 0 to 10 psig(0 to 68.9 kPa)

Reset Start Point

Field-adjustable from 0 to 10 psig(0 to 68.9 kPa)

Main Air Pressure

15 to 30 psig (103 to 207 kPa)

Air Consumption

28.8 scim (0.472 L/m) at 20 psig (138 kPa) main air pressure


40 to 120ºF (4 to 49°C)

Storage Environment

-40 to 140ºF (-40 to 60°C)

Output Sensitivity

5 psig/0.02 in. wg (34.5 kPa/5.0 Pa)

Physical Dimensions

Width: 4.5" (114.3 mm)Length: 2.3" (58.4 mm)

The pneumatic volume regulator (PVR) is a controller that provides aconsistent airflow to the space, regardless of varying inlet duct pressureconditions, in response to a pneumatic thermostat signal.The controllermaintains minimum and maximum airflow setpoints.The 3011 PVR can beset to control either normally open or normally-closed air valve actuatorsand can be calibrated to accept either direct-acting or reverse-actingthermostat signals. Fixed reset control of maximum and minimum airflowsetpoints is provided.

110 VAV-PRC011-EN

Pneumatic Controls

Height: 3.87" (98.3 mm)Weight: 11 oz (312 g)

3501 Pneumatic Volume Regulator

This is in contrast to the 3011 PVR, which resets velocity pressure with a change in thermostatpressure.This allows the 3501 PVR to have improved stability at low flows.

Specifications

Differential Pressure Range

0–1.0 in. wg (0–249 Pa)

Minimum Setpoint Range

0–1.0 in. wg (0–249 Pa)

Maximum Setpoint Range

Minimum to 1.0 in. wg (249 Pa)

Operating Static Pressure Range

0.25–6.0 in. wg (62.3–1494 Pa)

Reset Pressure Span


Reset Start Point


Main Air Pressure

15–30 psig (103 to 207 kPa)

Air Consumption

43.2 scim (0.708 L/m) at 20 psig (138 kPa) main air pressure


40 to 120ºF (4 to 49°C)

Storage Environment

-40 to 140ºF (-40 to 60°C)

Tubing Connections:1/4" O.D. tubing connectionsThe 3501 PVR can be set to control either normally open or normally-closedair valve actuators and can be calibrated to accept either direct-acting orreverse-acting thermostat signals. Fixed reset control of maximum andminimum airflow setpoints is provided.The controller is used primarily indual-duct constant-volume applications because of its linear outputresponse characteristics.The controller resets the primary air velocitylinearly with a change in thermostat pressure.

VAV-PRC011-EN 111

Pneumatic Controls

Output Sensitivity

5 psig/ 0.02 in. wg (34.5 kPa/ 5.0 Pa)

Physical Dimensions

Width: 4.5" (114.3 mm)Length: 3.87" (98.3 mm)Height: 4.1" (104.1 mm)Weight: 12 oz (340 g)

Pneumatic Damper Actuator

Specifications

Effective Area

8 sq inches (51.6 sq cm)

Normal Rotation

100 degrees

Spring Ranges

Model 3631–5000: 8-13 psi (55.2–89.6 kPa)

Model 3631–8000: 3-8 psi (20.7–55.2 kPa)

Supply Connection

3/16" (4.8 mm) nipple for ¼" (6.4 mm) O.D. tubing

Weight

1.5 lbs (680 g)

Ambient Limits:

Operating:-20 to 120°F(-28.889 to 48.889°C)Shipping:-40 to 140°F (-40 to 60°C)

Reversing Relay

The pneumatic actuator is designed for use on VAV terminal units in HVACsystems.The damper actuator mounts to a standard ½" diameter shaft by apin and cross hold arrangement, retaining clip, and non-rotation bracket.Two model actuators are offered with spring ranges of 3–8 psi or 8–13 psi.

Tubing Connections:1/4" O.D. tubing connectionsThe pneumatic reversing relay is a proportional device that reverses theaction of the input signal. It is used to change a direct-acting signal into areverse-acting signal or to change a reverse-acting signal into a direct-actingsignal.This relay is used to match the operating pressure range of controlleddevices (valves, pressure switches, etc.) to the output pressure range of acontroller (such as a thermostat).The output response will always remain in1:1 proportion to the input signal, but the relay includes the capability to biasthe output signal.

112 VAV-PRC011-EN

Pneumatic Controls

Specifications

Factory Setting

Contingent upon the selected control option

Generally set for 8 psig in. = 8 psig out or 9 psig in=9 psig out (55.2 kPa in. = 55.2 kPa out or 62.1kPa in. = 62.1 kPa out)

Bias Adjustment

+/- 15 psig (103 kPa)

Main Air Pressure

15-30 psig (103–207 kPa)

Air Consumption

18 scim (0.295 L/m) at 20 psig (138 kPa) main air pressure


40 to 120ºF (4°C to 49°C)

Storage Environment

-40 to 140ºF (-40 to 60°C)

Physical Dimensions


VAV-PRC011-EN 113

Pneumatic Controls

Signal Limiter

Specifications

Factory Setting

Maximum output = 8 psig (55.2 kPa) Adjustable from 2–12 psig (13.8–82.7 kPa)

Main Air Pressure

Nominal 20 psig (138 kPa) 22 psig(152 kPa) maximum acceptable pressure

Air Consumption

10 scim (0.164 L/m) at 20 psig (138 kPa) main air pressure


50 to 120ºF (10 to 48.89°C)

Physical Dimensions

Width:. 1.1" (27.94 mm)|Length: 0.9" (22.86 mm)Height: 0.9" (22.86 mm)

Tubing Connections

9/100" (2.3 mm) nipples

Tubing Connections:3/16" (4.8 mm) nipples for 1/4" (6.4 mm) polyethylene tubingThe pneumatic signal limiter is a pressure limiting type device.The outputpressure from the signal limiter is not allowed to rise above the signallimiter’s setting. Adjustments to the output pressure setting are made via ascrew on the back side of the valve.

114 VAV-PRC011-EN

Pneumatic Controls

Remote Mounted

(Direct Acting)

(Direct Acting)

Remote Mounted

Optional or installed by others.

One PipeRestrictor

T-Stat Branch Pressure (kPa)

%Fl

ow

(CFM

) Water valve

CFMMin

CFM

8 10

20.7

Max

100

20(137.9)

55.2

%Fl

ow

(LP

S)

Air Flow

LPSMin

LPSMax

100

Customer Notes:

1. Factory installed.

Restricted LegS

(137.9)20

Tee

One Pipe Inset

T-Stat

S

MVolume

Regulator

T

Tee

(N.O.)ValveWater 15

(103.4)(137.9)20

T-Stat

Two Pipe

(20.69 - 55.16 kPa)3-8 PSI

S

Remote Mounted


Air

Valv

ePo

sitio

n


T-Stat Branch Pressure (PSI)

100

3 8

20.7

55.2

13

100

89.6

Customer Notes:

Factory installed.1.

Restricted Leg

20

S

(137.9)One Pipe Inset

(Direct Acting)

T-Stat

Actuator

(137.9)20

RestrictorTee

One Pipe

Remote Mounted

Two Pipe

(Direct Acting)

T-Stat

S

T-Stat Branch Pressure (PSI)3 13 15

69 89.6

103.

4

(Normal Operation: Cooling with Hot Water Reheat)Normally-Closed Damper, Actuator, and 3011 Pneumatic Volume Regulator(Direct-Acting Thermostat)

PC04 – VCCF and VCWF - Single-Duct Terminal Units

With an increase in room temperature, the thermostat output pressure is increased. This signal is input for the volume regulator, whichalso receives inputs from the high- and low-pressure sides of the flow ring. The volume regulator outputs a signal compensated forchanging duct pressure to the valve actuator which opens the damper and increases primary cooling flow to the space. With adecrease in room temperature, the opposite action occurs. Minimum and maximum primary airflow settings are maintained by thevolume regulator. When the system is designed with reheat, heating stages are energized at the appropriate pressure settings.

With an increase in room temperature, the thermostat output pressure is increased and the actuator opens to increase primarycooling airflow to the space. With a decrease in room temperature, the opposite action occurs.

PC00 – VCCF - Single-Duct Terminal Units(Normal Operation: Cooling Only)Normally-Closed Damper and Actuator (Direct-Acting Thermostat)

%P

osi

tio

n(O

pen

)

%P

osi

tio

n(O

pen

)

VAV-PRC011-EN 115

Pneumatic Controls

Optional or installed by others.Factory installed.

LimiterMinimum

Restricted Leg

One Pipe Inset

Capped

Diverting



MinCFM

CFMMax

100

3 8 10

M

T

13 15

MinLPS

LPSMax

3-8 PSI

100

Customer Notes:1.

Restrictor

(20.69 - 55.16 kPa)

Valve(N.O.)

Water

Relay

S

Tee

C

NC

NOTee

TeeRestrictor

Bleed

Restricted Leg Ports

With an increase in room temperature, the thermostat output pressure is decreased. This signal is input for the volume regulator, which alsoreceives the inputs from the high- and low-pressure sides of the flow ring. The volume regulator outputs a signal compensated for changingduct pressure to the valve actuator which opens the damper and increases primary cooling flow to the space. With a decrease in roomtemperature, the opposite action occurs. Minimum and maximum primary airflow settings are maintained by the volume regulator. When thesystem is designed with reheat, heating stages are energized at the appropriate pressure settings.



MaxCFM

CFMMin

3 8 10 1513Stages of Heat

LPSMin

LPSMax

M

Terminal BoxElectric Heater

T

Tee

With a decrease in room temperature, the thermostat output pressure is decreased. This signal is input to the volume regulator, which alsoreceives inputs from the high- and low-pressure sides of the flow ring. The volume regulator outputs a signal compensated for changing ductpressure to the valve actuator, which closes the damper and decreases primary cooling flow to the space. With a further decrease in roomtemperature, the auxiliary limit will override the thermostat signal, which is followed by the reheat being energized. Once the reheat has beenenergized, the volume regulator will send a signal to the actuator to open to its secondary minimum. With an increase in temperature, theopposite action occurs. Minimum and maximum airflow settings are maintained by the volume regulator. Heating stages are energized at theappropriate pressure settings.

(Normal Operation: Cooling with Hot Water Reheat - Auto Dual Minimum)Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Direct-Acting Thermostat)

PN11 – VCWF - Single-Duct Terminal Units

RegulatorVolume

RegulatorVolume

Restrictor

Customer Notes:1. Factory installed.

One Pipe Inset

Restricted Leg

Tee


(Normal Operation: Cooling with Electric Reheat)Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Direct-Acting Thermostat)

PN05 – VCCF and VCEF - Single-Duct Terminal Units%

Flo

w(C

FM)

%Fl

ow

(CFM

)

%Fl

ow

(LP

S)

%Fl

ow

(LP

S)

Two PipeRemote Mounted

T–Stat(Direct Acting)

One PipeRemote Mounted

T–Stat(Direct Acting)


T–Stat(Reverse Acting)


T–Stat(Reverse Acting)

15

(103.4) 20

(137.9)

20(137.9)

S

S

S20

(137.9)

S

S

S20

(137.9)

20(137.9)

15

(103.4) 20

(137.9)

S20

(137.9)

116 VAV-PRC011-EN

Pneumatic Controls

One Pipe

Restricted Leg

(Reverse Acting)

Remote Mounted

One Pipe Inset

Factory installed.Optional or installed by others.



100

ConstantVolume

%Flo

w(C

FM

)

Constant Volume

3 8 10

Air Valve

20.7

55.2

69

%Flo

w(L

PS

)

13 15

1st

2nd

Stages of Heat

3rd

89.6

103.4

100

Customer Notes:1.

Tee

20(137.9)

S

20(137.9)

S

MVolume

Regulator

(103.4)

Electric Heater

T

Terminal Box

Restrictor

Remote Mounted

(Reverse Acting)

(137.9)15 20

Two Pipe

T-Stat

S

T-Stat

Two Pipe

Remote Mounted

(Direct Acting)

T-Stat

(Direct Acting)

Remote Mounted

Restricted Leg

One Pipe Inset



Constant VolumeAir Flow


ConstantVolume

3 8

100

%Flo

w(C

FM

) Water

Valve

20.7

55.2

1510 13

103.4

69

89.6

100

%Flo

w(L

PS

)

Customer Notes:1.

20(137.9)

S

20(137.9)

S

M VolumeRegulator (20.69 - 55.16 kPa)

3-8 PSI

T

(N.O.)

RestrictorTee

ValveWater

(103.4)15

(137.9)20

S

One Pipe

T-Stat

The unit shall operate to a constant volume flow regardless of changes in space temperature. The volume regulator receives the inputs fromhigh- and low-pressure sides of the flow ring. The volume regulator outputs a signal compensated for changing duct pressure to maintainconstant volume flow. When reheat is applied, heating stages are energized at the appropriate settings.

(Normal Operation: Cooling with Electric Reheat - Constant Volume)Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Reverse-Acting Thermostat)

PN34 – VCEF - Single-Duct Terminal Units

The unit shall operate to a constant volume flow regardless of changes in space temperature. The volume regulator receives the inputs fromhigh- and low-pressure sides of the flow ring. The volume regulator outputs a signal compensated for changing duct pressure to maintainconstant volume flow. When reheat is applied, heating stages are energized at the appropriate settings.

PN32 – VCWF - Single-Duct Terminal Units(Normal Operation: Cooling with Hot Water Reheat - Constant Volume)Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Direct-Acting Thermostat)

VAV-PRC011-EN 117

Pneumatic Controls

One Pipe Inset

Remote Mounted

(Direct Acting)



AirFlo

w

MinCFM

3 8

55.2

20.7

%Fl

ow

(CFM

)

CFMMax

100 Water Valve

S

(137.9)20

10

LPSMin

103.

4

69 89.6

%Fl

ow

(LP

S)

LPSMax

100

(137.9)20S

Restricted Leg

RestrictorTee

T-Stat

One Pipe

RegulatorM Volume

T

Tee

(20.69 - 55.16 kPa)

(N.O.)ValveWater

3-8 PSI

Two Pipe

(Direct Acting)T-Stat

Remote Mounted

(103.4) 2015

(137.9)

S


Customer Notes:

1. Factory installed.

With an increase in room temperature, the thermostat output pressure is increased. This signal is input for the volume regulator, which alsoreceives inputs from the high- and low-pressure sides of the flow ring. The volume regulator outputs a signal compensated for changing ductpressure to the valve actuator, which opens the damper and increases primary cooling flow to the space. With a decrease in room temperature,the opposite action occurs. Minimum and maximum primary airflow settings are maintained by the volume regulator. When the system isdesigned with reheat, heating stages are energized at the appropriate pressure settings.



100

Air Valve

3 8

20.7

55.2

100

Actuator

20


(Reverse Acting)T-Stat

S

(Normal Operation: Cooling Only)Normally-Open Damper and Actuator (Reverse-Acting Thermostat)With an increase in room temperature, the thermostat output pressure is decreased and the actuator opens to increase primary coolingairflow to the space. With a decrease in room temperature, the opposite action occurs.

(Normal Operation: Cooling with Hot Water Reheat)Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Direct-Acting Thermostat)

PN04 – VCCF and VCWF - Single-Duct Terminal Units

13 15


One Pipe

T-Stat

Restricted Leg

(Reverse Acting)

Remote Mounted

One Pipe Inset

1.

Customer Notes:

20(137.9)

S

TeeRestrictor

(137.9)

PN00 – VCCF - Single-Duct Terminal Units%

Po

siti

on

(Op

en)

%P

osi

tio

n(O

pen

)

118 VAV-PRC011-EN

Pneumatic Controls

T-Stat

One Pipe

Remote Mounted

(Reverse Acting)

One Pipe Inset


(137.9)T-Stat Branch Pressure (kPa)


100

MaxCFM

MinCFM%

Flo

w(C

FM)

Air Flow

3 8 10 13 15

1st

2nd

20

20.7

69

Stages of Heat

3rd

Customer Notes:

1.

S

20(137.9)

RestrictorTee

Restricted Leg

T

S

M RegulatorVolume

15 20

Tee

Electric HeaterTerminal Box

Two Pipe

T-Stat

(Reverse Acting)

Remote Mounted

(137.9)(103.4)

S

LPS

LPS

Max

Min

%Fl

ow

(LP

S)

100

55.2

89.6

103.

4

(Normal Operation: Cooling with Electric Reheat)Normally-Closed Damper, Actuator, and 3011 Pneumatic Volume Regulator (Reverse-Acting Thermostat)

PC05 – VCCF and VCEF - Single-Duct Terminal Units

With an increase in room temperature, the thermostat output pressure is decreased. This signal is input for the volume regulator, which also receivesthe inputs from the high- and low-pressure sides of the flow ring. The volume regulator outputs a signal compensated for changing duct pressure tothe valve actuator which opens the damper and increases primary cooling flow to the space. With a decrease in room temperature, the oppositeaction occurs. Minimum and maximum primary airflow settings are maintained by the volume regulator. When the system is designed with reheat,heating stages are energized at the appropriate pressure settings.

VAV-PRC011-EN 119

Pneumatic Controls



Heatin

g

%P

osi

tio

n(O

pen

)

3 8

Cooling

100

20.7

55.2

13 15

100

89.6

103.

4

8 PSI Out(55.16 kPa)

(55.16 kPa)8 PSI In

RelayReversing

B SM

Tee


Customer Notes:1.

Remote MountedTwo Pipe

T-Stat(Reverse Acting)

RestrictorTee

Restricted Leg

One Pipe Inset


(Reverse Acting)T-Stat

ActuatorActuator

(Direct Acting)

Remote Mounted

One Pipe Inset


CoolingHeating

Coolin

g



3 8

55.2

20.7

CFM

%Fl

ow

(CFM

)

MinCFM

Max100 Heating

1. Factory installed.1513



Customer Notes:

103.

4

89.6

100

MaxLPS

MinLPS %

Flo

w(L

PS

)

One PipeRestrictorTee

Restricted Leg

T-Stat

B

M

Flow Ring

Actuator

Heating

LO

HI

CoolingFlow Ring

Actuator

RegulatorVolume

H L T LO

HI

M

B

H L T

With an increase in room temperature, the thermostat pressure is decreased. The cooling valve actuator opens the damper toincrease primary cooling flow to the space, the heating valve is closed. With a decrease in room temperature, the heating valvemodulates and the cooling valve is closed.

%P

osi

tio

n(O

pen

)

20(137.9)

S

20(137.9)

S

20(137.9)

S

(137.9)

S20

S

(137.9)20

S

(137.9)20

S

(137.9)20

VolumeRegulator

(Normal Operation: Cooling and Heating)Normally-Open Heating Damper with Actuator and Normally-Open Cooling Damper with Actuator(Reverse-Acting Thermostat)

PN08 – VDDF - Dual-Duct Terminal Units

PN09 – VDDF - Dual-Duct Terminal Units(Normal Operation: Cooling and Heating)Normally-Open Heating Damper with Actuator, Normally-Open Cooling Damper with Actuator, and3001 Pneumatic Volume Regulator (Qty of 2) (Direct-Acting Thermostat)With an increase in room temperature, the thermostat output pressure is decreased. This signal is input to the volume regulator,which also receives the inputs from the high- and low-pressure from the flow ring. The volume regulator outputs a signalcompensated for changing duct pressures to the valve actuator, which opens the damper and increases primary cooling flow to thespace. With a decrease in room temperature, the opposite action occurs. Minimum and maximum primary airflow settings aremaintained by the volume regulator. If the zone temperature continues to decrease after the fan has been energized, heating stagesare energized at the appropriate pressure settings.

120 VAV-PRC011-EN

Pneumatic Controls



Cooling

%F

low

(CF

M)

3 8

Heating

MinCFM

CFMMax100

20

.7

55

.2

13 15

LPSMin

LPSMax

100

89

.6

10

3.4


Customer Notes:1.

Remote MountedTwo Pipe

T-Stat(Direct Acting)

RestrictorTee

Restricted Leg

One Pipe Inset



Actuator

Flow RingLOHI

VolumeRegulatorM

B

H L T

Actuator

Flow RingLOHI

VolumeRegulatorM

B

H L T

Heating Cooling

Heating Cooling

%F

low

(LP

S)

(Direct Acting)

Remote Mounted

One Pipe Inset


CoolingHeating

Cooling



3 8

HeatingMax

%F

low

(CF

M)

CFMMin

CFM

100

20

.7

55

.2

1. Factory installed.1513



Customer Notes:

10

3.4

100

MaxLPS

MinLPS

89

.6

%F

low

(LP

S)

RestrictorTee

One Pipe

Restricted Leg

T-Stat

B

M

Flow Ring

Actuator

Heating

LO

HI

CoolingFlow Ring

Actuator

Regulator

LinearReset

Volume

H LT LO

HI

M Regulator

LinearReset

VolumeB

H LT

(137.9)20S

(137.9)

S20

(137.9)

S20

(137.9)

S20

(137.9)20S

S20

(137.9)

S20

(137.9)

S20

(137.9)

PC03 – VDDF - Dual-Duct Terminal Units(Normal Operation: Cooling and Heating)Normally-Closed Heating Damper with Actuator, Normally-pen Cooling Damper with Actuator, and3011 Pneumatic Volume Regulator (Qty of 2) (Direct-Acting Thermostat)

PN10 – VDDF - Dual-Duct Terminal Units(Normal Operation: Cooling and Heating - Constant Volume)Normally-Open Heating Damper with Actuator, Normally-Open Cooling Damper with Actuator, and3501 Pneumatic Volume Regulator (Qty of 2) (Direct-Acting Thermostat)

in Discharge

With an increase in room temperature, the thermostat output pressure is increased. This signal is input to the volume regulators,which also receives the inputs from the high- and low-pressure from the flow ring. The cooling volume regulator outputs a signalcompensated for changing duct pressure to the valve actuator, which opens the damper and increases primary cooling airflow to thespace. The heating valve is at a minimum flow. With a decrease in room temperature, the heating valve modulates in response tosignals from the heating pneumatic volume regulator, while maintaining constant volume at the discharge. The heating minimumand maximum settings and the constant volume settings are maintained by the volume regulators.

With an increase in room temperature, the thermostat output pressure is increased. This signal is input to the volume regulators,which also receives the inputs from the high- and low-pressure from the flow ring. The cooling volume regulator outputs a signalcompensated for changing duct pressure to the valve actuator, which opens the damper and increases primary cooling airflow to thespace. The heating valve is at a minimum flow. With a decrease in room temperature, the heating valve modulates in response tosignals from the heating pneumatic volume regulator. The heating valve is at a minimum flow. Both heating and cooling minimumand maximum settings are maintained by the volume regulators.

VAV-PRC011-EN 121

Pneumatic Controls


Customer Notes:1. Factory installed.

(Reverse-Acting)

Remote Mounted

One Pipe Inset

(Reverse-Acting)

Remote Mounted

Tee

T-Stat Pressure (PSI)

T-Stat Pressure (kPa)

3

100

Pos

ition

% Air Valve

20.7

Stages of Heat148 9 10 12

1st

96.5

2nd

Fan On

55.2

62.1

69 82.7

100

3rd

Restricted Leg

(137.9)20S

T-Stat

ActuatorTee

Terminal BoxElectric Heater

Fan P.E.

Tee(N.O.)Switch

(62.06 kPa)9 PSI

Restrictor One Pipe

Two Pipe

T-Stat

(103.4)15(137.9)20

S

T-Stat Pressure (kPa)

T-Stat Pressure (PSI)

100

Pos

ition

%

Air Valve

3

20.7

Restrictor

Customer Notes:

100

8 9

Fan On

1.

Switch(N.O.)

(62.06 kPa)9 PSI55

.262

.1

FanP.E.

20

One Pipe Inset


One Pipe

T-StatRemote Mounted

(Reverse-Acting)

Restricted LegS

(137.9)

Tee

Actuator

15

(103.4)

Tee

(137.9)


(Reverse-Acting)T-Stat

20

S

Pos

ition

%

Pos

ition

%

PN00 – VPCF, LPCF Parallel Fan-Powered Without Reheat(Normal Operation: Cooling Only)Normally-Open Damper and Actuator (Reverse-Acting Thermostat)With an increase in room temperature, the thermostat output pressure is decreased and the actuator opens toincrease primary cooling airflow to the space. With a decrease in room temperature, the opposite action occursuntil the damper is fully closed. Upon a continued decrease in zone temperature below setpoint, the parallel fanis energized.

PN00 – VPEF, LPEF Parallel Fan-Powered with Electric Heat(Normal Operation: Cooling Only)Normally-Open Damper and Actuator (Reverse-Acting Thermostat)With an increase in room temperature, the thermostat output pressure is decreased and the actuator opens to increaseprimary cooling airflow to the space. With a decrease in room temperature, the opposite action occurs until the damperis fully closed. Upon a continued decrease in zone temperature below setpoint, the parallel fan is energized. If zonetemperature continues to decrease after the fan has been energized, heating stages are energized at the appropriatepressure settings.

122 VAV-PRC011-EN

Controls Specifications

For allVariTrane™ units, the unit controller continuously monitors the zone temperature and variesthe primary airflow as required to meet zone setpoints. Airflow is limited by adjustable minimumand maximum setpoints.

Additionally, for series fan-powered units, the controller will start and run the fan continuouslyduring the occupied mode and intermittently during the unoccupied mode. Upon a further call forheat, any hot water or electric heat associated with the unit is enabled.

For parallel fan-powered units, the controller energizes the fan upon a call for heat. Upon a furthercall for heat, reheat is enabled.

Direct Digital Controls (DDC)

LonMark™ Direct Digital Controller

Trane-designed LonMark certified controller uses the space comfort control (SCC) profile toexchange information over a LonTalk™ Network. LonMark networks provide the latest openprotocol technology.

Direct Digital Controller

The microprocessor-based terminal unit controller provides accurate, pressure-independentcontrol through the use of a proportional integral control algorithm and direct digital controltechnology.The UCM, monitors zone temperature setpoints, zone temperature, the rate oftemperature change, and valve airflow.With the addition of optional sensors, room occupancy orsupply duct air temperature can be monitored.The controller is provided in an enclosure with7/8” (22 mm) knockouts for remote control wiring. ATrane DDC zone sensor is required.

DDC Actuator

Trane 3-wire, 24-VAC, floating-point quarter turn control actuator with linkage release button.Actuator has a constant drive rate independent of load, a rated torque of 35 in-lb, a 90-second drivetime, and is non-spring return.Travel is terminated by end stops at fully opened and closedpositions. An integral magnetic clutch eliminates motor stall.

DDC Actuator - Belimo

LMB24-3-TTN 3-wire, 24VAC/DC, floating-point, quarter turn actuator with linkage release button.Actuator has a constant drive rate independent of load, a rated torque of 45 in-lb, a 95 second drivetime, and is non-spring return.Travel is terminated by end stops at fully-opened and -closedpositions. Internal electronic control prevents motor stall when motor reaches end stops.

DDC Zone Sensor

The UCM controller measures zone temperature through a sensing element located in the zonesensor. Other zone sensor options may include an externally-adjustable setpoint, communicationsjack for use with a portable service tool, and an override button to change the individual controllerfrom unoccupied to occupied mode.The override button has a cancel feature that will return thesystem to unoccupied. Wired zone sensors utilize a thermistor to vary the voltage output inresponse to changes in the zone temperature.Wiring to the UCM controller must be 18 to 22 awg.twisted pair wiring.The setpoint adjustment range is 50–88ºF (10–31°C) Depending upon thefeatures available in the model of sensor selected, the zone sensor may require from a 2-wire toa 7-wire connection. Wireless zone sensors report the same zone information as wired zonesensors, but do so using radio transmitter technology. No wiring from the zone sensor to the UCMcontroller is necessary.

Digital Display Zone Sensor with Liquid Crystal Display (LCD)

The direct digital zone sensor contains a sensing element which sends a signal to the UCM.A LiquidCrystal Display (LCD) indicates setpoint, or space temperature. Sensor buttons allow setpointadjust, and allow space temperature readings to be turned on or off.The digital display zone sensor

VAV-PRC011-EN 123


also includes a communication jack, for use with a portable edit device, and an override button tochange the UCM from unoccupied to occupied.The override button has a cancel feature, whichreturns the system to unoccupied mode.The digital display zone sensor requires seven wires, onefor 24-VAC power.

Pneumatic Controls

Normally-Open Actuator

Pneumatic 3 to 8 psig (20 to 55 kPa) spring-range pneumatic actuator.

Normally-Closed Actuator

Pneumatic 8 to 13 psig (55 to 90 kPa) spring-range pneumatic actuator.

3011 Pneumatic Volume Regulator (PVR)

The regulator is a thermostat reset velocity controller, which provides consistent air delivery within5% of cataloged flow down to 15% of unit cataloged cfm, independent of changes in system staticpressure. Factory-calibrated, field-adjustable setpoints for minimum and maximum flows.Average total unit bleed rate, excluding thermostat, is 28.8 scim at 20 psig (7.87 mL/min at 138 kPa)supply.

3501 Pneumatic Volume Regulator (PVR)

The 3501 regulator is a linear-reset volume controller.This PVR is used to maintain a constantvolume of airflow from the dual-duct unit when constant volume control is used.Average total unitbleed rate, excluding thermostat, is 43.2 scim at 20 psig (11.8 mL/min at 138 kPa) supply.

Considerations for PneumaticThermostat

Field-supplied and -installed based on chosen control options, a direct-acting or a reverse- acting,one-pipe or two-pipe pneumatic room thermostat will control the available air valve, reheat andfan switch to maintain room temperature setpoint.

The following pneumatic control features are available with VariTrane terminal units:

• Controls Option – PN00: Cooling with Normally-Open damper and actuator only (Reverse-ActingThermostat)

• Controls Option – PN04: Cooling with hot water reheat, Normally-Open damper, 3011 PVR(Direct-ActingThermostat)

• Controls Option – PN05: Cooling with electric reheat, Normally-Open damper, 3011 PVR(Reverse-ActingThermostat)

• Controls Option – PN08: Cooling and Heating, Normally-Open dampers, actuators only(Reverse-ActingThermostat)

• Controls Option – PN09: Cooling and Heating, Normally-Open dampers, 3011 PVR’s (Direct-ActingThermostat)

• Controls Option – PN10: Cooling and Heating, Normally-Open dampers, 3501 PVR’s, Dual-DuctConstant Volume (Direct-ActingThermostat)

• Controls Option – PN11: Cooling with hot water reheat, Normally-Open damper, 3011 PVR -AutoDual Minimum (Direct-ActingThermostat) (N.O. Water Valve)

• Controls Option – PN32: Cooling with hot water reheat, Normally-Open damper, 3011 PVR -Constant Volume (Direct-ActingThermostat)

• Controls Option – PN34: Cooling with electric reheat, Normally-Open damper, 3011 PVR -Constant Volume (Reverse-ActingThermostat)

• Controls Option – PN51: Cooling with reheat, Normally-Open damper, 3011 PVR Duct PressureSwitch (Reverse-ActingThermostat)

124 VAV-PRC011-EN


• Controls Option – PN52: Cooling with reheat, Normally-Open damper, 3011 PVR - Dual PressureMinimum (Reverse-ActingThermostat)

• Controls Option – PC00: Cooling Only with Normally-Closed damper - Direct-ActingThermostat

• Controls Option – PC03: Cooling and Heating, Normally-Closed heating damper, Normally-Open cooling damper, actuators only - Direct-ActingThermostat

• Controls Option – PC04: Cooling with hot water reheat, Normally-Closed damper, 3011 PVR -Direct-ActingThermostat

• Controls Option – PC05: Cooling with electric reheat, Normally-Closed damper, 3011 PVR -Reverse-ActingThermostat

Options

Power Fuse (cooling only and hot water units, and VDDF)

An optional fuse is factory-installed in the primary voltage hot leg.

Transformer (Standard on fan-powered, optional on VCCF, VCWF, VDDF)

The 50-VA transformer is factory-wired and installed in an enclosure with 7/8" (22 mm) knockoutsto provide 24 VAC for controls.

Wireless Zone Sensor/Receiver

Factory mounted Receiver with field mounted sensor accessory eliminates the need for the wiringbetween the zone sensor and unit level controller.

Disconnect Switch (Optional on VCCF, VCWF, VDDF)

Disengages power.

Hot Water Valves

Two-Position Valve

The valve is a field-adaptable for 2-way or 3-way piping arrangements.All connections are NationalPipeThread (NPT).The valve body is forged brass with a stainless steel stem and spring. Upondemand, the motor strokes the valve.When the actuator drive stops, a spring returns the valve toits fail-safe position.

Flow Capacity – 4.0 CvOverall Diameter – ½" NPTClose-Off Pressure – 25 psi (172 kPa)

Flow Capacity – 5.0 Cv,Overall Diameter – 3/4" NPTClose-Off Pressure – 20 psi (138 kPa)

Flow Capacity – 8.0 CvOverall Diameter – 1" NPTClose Off Pressure – 17 psi (117 kPa)

Maximum Operating FluidTemperature – 200°F (93°C)

Maximum System Pressure – 300 psi (2067kPa)

Maximum Static Pressure – 300 psi (2067kPa)

Electrical Rating – 7 VA at 24 VAC, 6.5 Watts, 50/60Hz

8 feet (2.44 m) of plenum rated wire lead is provided with each valve.

VAV-PRC011-EN 125


Proportional Water Valve—The valve is a field-adaptable, 2-way or 3-way configuration andships with a cap over the bottom port.This configures the valve for 2-way operation. For 3-wayoperation, remove the cap.The valve is designed with an equal percentage plug.The intended fluidis water or water and glycol (50% maximum glycol).The actuator is a synchronous motor drive.The valve is driven to a predetermined position by the UCM controller using a proportional plusintegral control algorithm. If power is removed, the valve stays in its last position.The actuator israted for plenum applications under UL 94-5V and UL 873 standards.

Pressure andTemperature Ratings –The valve is designed and tested in full compliance with ANSIB16.15 Class 250 pressure/temperature ratings, ANSI B16.104 Class IV control shutoff leakage, andISA S75.11 flow characteristic standards.Flow Capacity – 0.70 Cv, 2.2 Cv, 3.80 Cv, 6.60 Cv

Overall Diameter – ½" NPT, ¾" NPT (6.6 Cv)

Maximum Allowable Pressure – 300 psi (2068 kPa)

Maximum Operating FluidTemperature – 200ºF (93°C)

Maximum Close-off Pressure – 55 psi (379 kPa)

Electrical Rating – 6VA at 24 VAC.

10 feet (3.05 m) of plenum rated 22-gage wire for connection.Terminations are #6 stabs.

DDC Retrofit Kit (VRTO)

The kit consists of aTrane DDC Unit Control Module (UCM) VAV terminal unit controller and apressure transducer installed in a metal enclosure.The mechanical specifications of accessoriessuch as DDC zone sensors, hot water valves, and transformers are found elsewhere in this section.

Retrofit Kit Options

Flow Bar Sensor

The flow bar sensor is a multiple-point, averaging, pitot tube type flow sensor. It is intended for fieldinstallation on terminal units that have no flow measurement device.The total and static pressureoutputs of the sensor are field-piped to the high and low inputs of the pressure transducer in theretrofit kit.

Retrofit Kit Actuator

The electric actuator is a direct-coupled type actuator that utilizes three-wire, floating-point control.The actuator is field-installed to the damper shaft and field-wired to the controller.

Trane Actuator – Actuator is rated at 4VA at 24VAC. Drive time is 90 seconds with 35 in.-lb (4 N-m).

Retrofit Actuator – Actuator is rated at 3 VA at 24 VAC. Drive time is 80 to 110 seconds for 0 to 35in.-lb (0 to 4 N-m).

Other Options Available

• DDC Zone Sensors - wired or wireless

• 2-Position & Modulating Water Valves

• ControlTransformer (Ships loose with mounting plate for 4x4 junction box)

• AuxiliaryTemperature Sensor

• Zone Occupancy Sensors

• Co2 Sensors (Room- or duct-mounted)

126 VAV-PRC011-EN

Application Considerations

VAV System

There are two primary types of VAV systems—single-duct and dual-duct.

Single-Duct Systems

Single-duct systems include one supply fan and a single supply duct, which is attached to eachzone.The supply fan delivers cooled air to theVAV zones in variable volumes, depending upon thecooling requirements.The supply fan is usually designed to modulate airflow delivered to theVAVzones.

Many VAV zones require heating as well as cooling.The supply air-handling unit provides eitherno heat (cooling only), morning warm-up heat or occupied (changeover) heat. In addition, heat maybe provided at any individual VAV zone (within the zone or within the VAV terminal) by reheatingcool air provided by the central air handler.

No Heat

Central Cooling Only—In some systems, the central air handler provides only cooling andventilation during zone occupied periods.The supply air is maintained at a constant temperatureand the supply airflow is modulated to match the VAV airflow rate with the zone coolingrequirements.

Central Heat

Central Heat for Morning Warm-up—Many buildings cool down during the night.To be at acomfortable temperature in the morning when the building is again occupied, heat must be addedto the spaces. Heat provided by the central air handler for morning warm-up is supplied at constantair volume to the zones, prior to the time of occupancy. During the morning warm-up period, theVAV terminal units must open to allow heated air to flow into the zones. In most instances very littleadditional heat is needed once the building is occupied.

Central Occupied Heating-Changeover—Some buildings use the same air handler to provideboth occupied cooling and occupied heating.This is commonly referred to as a changeover system.The system changes between heating and cooling depending on the need of the zones on thesystem. In a changeover system, the operation of the VAV terminal units must also change over,opening to provide heat in the heating mode and opening to provide cooling in the cooling mode.

RAEA

OA PAsupplyfan

coolingcoil

variable-speed drive

thermostat

VAVbox

SA

Variable-Air-Volume (VAV) System

VAV-PRC011-EN 127


Trane's main product in this type of application is calledVariTrac™.VariTrane products can also beused in these systems. (These types of systems are beyond the scope of this manual and arediscussed in detail in the VariTrac II Manual.

Terminal Heat

Remote Heat—In some zones of a single-ductVAV system, perimeter heating equipment, remotefrom the terminal unit, is used to add heat to the zone when the cooling load is lower than theminimum cooling capacity of the VAV terminal unit. Heat is added directly to the zone while coolsupply air continues to enter the zone at a minimum rate for zone ventilation.

Terminal Reheat—In some zones of a single-ductVAV system, a minimum flow of cool supply airis reheated at the terminal unit before entering the zone.Terminal reheat can be provided byelectrical resistance heaters or by hot water coils.

Parallel Fan-Powered Heat—In some zones of a single-duct VAV system, cool supply air atminimum flow is mixed with warm plenum air before entering the zone at a constant flow rate. Afan in the terminal unit, in parallel with the central fan, draws air from the plenum whenever thezone requires heat.

Series Fan-Powered Heat—In some zones of a single-duct VAV system, the airflow to the zoneis held constant, during both heating and cooling, by a terminal unit fan that is in series with thecentral fan.The terminal unit fan runs continuously. When the zone requires heat, cool supply airat minimum flow is mixed with warm, return plenum air before entering the zone.

Dual-Duct Systems

Dual-duct systems have either one or two supply fans and two duct systems. One duct systemcarries heated air and the other duct system carries cooled air. Heated air and cooled air aremodulated and/or mixed at each zone in the proper proportions to control zone temperature.Terminal reheat is not required in a dual-duct system.

Figure 8. Single-fan, dual-duct VAV system

VSD

supplyfan

central air handlercooling

coil

coilheating

105°F (40.6°C)

dual-ductVAV

terminalunits

EA

OA40°F

(4.4°C)

(23.9°C)75°F

(12.8°C)55°F

RA

128 VAV-PRC011-EN


VariTrane VAVTerminal Units

The function of the VariTrane terminal unit in a VAV control zone is to vary the volumetric airflowrate to the zone. VariTrane units are available with either microprocessor-based DDC controls orpneumatic or analog electronic controls. Factory-installed controls are available with all types ofterminal units.

VAVTerminal UnitTypes

Single-Duct

Single-duct terminal units control the volumetric flow of supply air to the space to maintain thezone temperature at setpoint.These units are generally applied in cooling-only VAV zones thatrequire no heat during occupied hours. If local zone heat is necessary it can be provided eitherremotely (for example, perimeter heat) or by terminal reheat (either electric or hot water coils).

Dual-Duct

Dual-duct terminal units are used in a special type of air distribution system where the main systemhas both warm air and cold air separately ducted to each terminal unit.The flow of both warm airand cool air is modulated, delivering air to theVAV zone at variable air volumes as well as variabletemperatures. Since full capacity occupied heating is always available, control of additional localheat is not provided.

Figure 9. Single-Duct cooling only unit (L) and single-duct unit with hot water coil (R)

Figure 10. Dual-Duct terminal unit

VAV-PRC011-EN 129


Fan-Pressure Optimization

WithTrane's Integrated Comfort System, the information fromVAV terminal units can be used forother energy-saving strategies. Fan-pressure optimization is the concept of reducing the supply fanenergy usage based on the position of the terminal unit dampers.

The control system allows this scenario.The system polls the VAV units for the damper positionon each unit.The supply fan is modulated until the most wide-open damper is between 85% and95% open.The correct airflow is still being sent to the zones since the controls of theVAV units arepressure-independent, and the fan modulates to an optimal speed and duct static pressure whichresults in fan energy savings.

Ventilation Reset

The Ventilation Reset control strategy enables a building ventilation system to bring in anappropriate amount of outdoor air per ASHRAE Standard 62.1.The basis for the strategy ismeasuring airflow at each zone, calculating current system ventilation efficiency using themultiple-zone system equations of the standard, and communicating a new outdoor airflowsetpoint to the air handler.

This strategy continually monitors the zone ventilation needs and system outdoor air intake flow,minimizing the amount of ventilation air and increasing the energy efficiency of the system. Thisinsures that the right amount of air is brought in at all times and that proper ventilation can bedocumented.Trane has integrated this control ability into the VAV controls, air-handler controls,and building controls.

For more detailed information on these energy-saving strategies, please refer to the “AdditionalReferences” section at the end of this chapter for appropriate material.

Figure 11. Optimized static-pressure control

Figure 12. Ventilation reset

130 VAV-PRC011-EN


ControlTypes

VAV terminal units are available with many different options.These options fall into three maincategories of controls: direct digital (DDC), pneumatic, and analog electronic. All of these controltypes can be used to perform the same basic unit control functions, yet differences exist in accuracyof performance, versatility, installed cost, operating cost, and maintenance cost.

Direct Digital Control (DDC) Systems

Benefits:

Performance—DDC controls offer PI control capability. A PI control scheme is the most accurateand repeatable control scheme available in the VAV terminal unit industry.

Versatility—DDC controls accepts software commands to determine how its outputs will becontrolled. When a control sequence must be modified, making changes to the softwareinstructions is easier and quicker than changing hardware.

Operating and Maintenance Costs—DDC controls can be networked together to provide system-control strategies for energy savings. Multiple controllers can be easily monitored and adjustedfrom a remote location. DDC controls also have system and individual diagnostic capability.

Disadvantages:

Versatility—The communications protocol between controllers will be different from one controllermanufacturer to another.

Installed Cost—DDC controls are the most expensive of the three control types.

Operating and Maintenance Costs—Building personnel must be trained to operate and maintainthe system.

Pneumatic Control Systems

Pneumatic control systems use compressed air through simple mechanical control devices,such as diaphragms, springs, and levers to change an output in response to a change in amonitored variable. With VAV terminal units, the output is typically a primary airflow and themonitored variable is zone temperature.

Benefits:

Performance—Pneumatic controls are a proven technology that is effective and has a long lifecycle.

Installed Cost—When a source of compressed air exists at the facility, pneumatics generally havea lower installed cost than other types of controls when only a basic functionality is required.

Operating and Maintenance Costs—Pneumatics are still the most familiar control technology tomany building designers and maintenance people.

Direct digital control (DDC) systems becameavailable as advances in computer technology madesmall microprocessors available and affordable.Much of the hardware in DDC systems is similar toanalog electronic systems.The primary difference isthat DDC controllers allow systemintegration, remotemonitoring, and adjustment.The microprocessor isprogrammed using software that gives the controllera higher level of capability than either the pneumaticor analog electronic options.

VAV-PRC011-EN 131


Large Installed Base—Pneumatic systems are very common in existing buildings.This eliminatesthe need to purchase the most expensive piece of equipment in a pneumatic control system—thecontrol air compressor. Extensions to existing pneumatic systems are generally very simple andextremely cost-effective.

Disadvantages:

Performance—Pneumatic controls provide proportional-only control for VAV terminal unitsystems.This control scheme is less accurate than the more advanced control schemes. Impropercalibration of pneumatic controls leads to poor energy utilization.

Versatility—A central pneumatic control system, where each of the control zones can be monitoredand adjusted from a remote location, is extremely costly to configure and to modify.

Operating and Maintenance Costs—Pneumatics easily drift and require constant upkeep andscheduled maintenance. Diagnostic capability for pneumatics is not available. A main compressorwhich is not maintained and becomes contaminated with oil or water can pump thosecontaminants into the compressed-air-distribution system.This may require costly cleaning of thesystem and a possible replacement of system components.

DDC Controls Basic Information

DDC controls have become the industry standard for VAV terminal unit control systems. DDCsystems use electronic field devices such as a flow transducer, a primary air modulating damper,and an electronic thermostat.These field devices report software instructions of how the outputsare positioned in relation to the inputs to a controller.The VariTrane™ system uses a primary airvalve and flow transducer for both DDC systems and analog electronic systems. However, the DDCzone sensor is different from the analog electronic thermostat.

DDC controls provide much flexibility and considerable diagnostic capability. DDC controllers canbe connected together to form a network of controllers. Once the controllers are networked, theycan be monitored for proper operation from a remote location. Commands and overrides can besent for groups of controllers at one time to make system-wide changes. Commands and overridescan be sent to individual units to allow problem diagnosis, temporary shutdown, startup schedulesor other specialized changes.When integrated into a building management system, the operationof the VAV terminal unit system can be modified to do such things, as coincide with occupancyschedules and reduce energy charges.

DDC control ofVAV terminal units is a key element in providing intelligent and responsive buildingmanagement. Precision control, flexible comfort, and after hours access are all available with theVariTrane™ DDC control system for VAV terminal units.

Key features of the system include:

• An advanced unit controller

• Flexible system design

• User-friendly interaction

Pneumatic Controls Basic Information

Pneumatic controls modulate air pressure of a controller to maintain setpoint. For VAV systems,there are two primary types of pneumatic controllers—the room thermostat and the pneumaticvolume regulator (PVR).

RoomThermostats

The most visible controller to the customer is the room thermostat. Pneumatic room thermostatscan be classified by two characteristics: the tubing connection(s) to the thermostat and the actionof the thermostat output in response to a change in the input.

Room thermostats are available in models that require a one-pipe or a two-pipe configuration.Thename is derived from the number of tubes that must run to the thermostat location.The difference

132 VAV-PRC011-EN


is really in the construction of the thermostats.The two-pipe thermostats have a constant pressuresupply connected via an air tube to the thermostat supply air port.The supply air travels throughthe thermostat’s relays, levers, diaphragm, and bleed port to produce an output.The output lineis connected to the output port of the thermostat and extends to the controlled device.The one-pipe thermostat has, as its name suggests, only one air line connection.The thermostat works byopening and closing an air bleed valve.This will either decrease or increase the pressure on thecontrolled device, which is connected to the same line that runs to the thermostat.

Room thermostats also can be classified by their reaction to a change in temperature. Roomthermostats classified this way are denoted as either direct-acting or reverse-acting. Direct-actingthermostats will increase their output pressure as the temperature the thermostat measuresincreases.

On the contrary, reverse-acting thermostats will decrease their output pressure as the temperaturethe thermostat measures increases.

Pneumatic Volume Regulators

These controllers accept the room thermostat signal and modulate theVAV terminal unit primaryair damper.The primary air damper is controlled for an airflow setpoint that is determined by theroom thermostat.The thermostat increases the PVR’s airflow setting when the temperature in thespace is warm. On the other hand, the thermostat decreases the PVR’s airflow setting when thetemperature in the space is cold.

Currently, VariTrane offers two models of pneumatic volume regulators in its controls offering—the 3011 regulator (used in most applications) and the 3501 model (used in dual-duct constant-volume applications).The primary difference is the 3501 PVR’s ability to change the velocitypressure linearly with a change in thermostat pressure, which results in improved stability at lowflows. In contrast, the 3011 PVR resets the velocity pressure with a change in thermostat pressure.

Reset Control of Minimum and Maximum Flow—The 3011 PVR and 3501 use fixed reset control ofminimum and maximum flow settings.The primary benefit of fixed reset in a pneumatic volumeregulator is stable flow control without excessive damper movement.

Fixed Reset—A fixed reset controller operates over a thermostat signal change of 5 psi betweenminimum and maximum flow, regardless of the differential pressure flow sensor signal.Thethermostat is usually set for a gain of 2.5; i.e. it produces a 2.5 psi output change per degree of spacetemperature change.This control strategy provides stable flow control with the primary air valvethrottling between minimum and maximum flow over a 2°F space temperature change.

Example 1: Air valve with a 6" inlet, Pneumatic thermostat gain = 2.5 psi/degree:

Minimum Flow=0 cfm, 0.0 in. wg flow signal

Maximum Flow=680 cfm, 2.0 in. wg flow signal

Figure 13. Direct-acting thermostat response (L) and direct-acting thermostat response (R)

VAV-PRC011-EN 133


2.0 in. wg signal range

The damper will modulate from zero to maximum position over a 2°F temperature change.

Bleed Port to Atmosphere—Bleeding air to the atmosphere is a normal operation for a volumeregulator.The 3011 volume regulator addresses this function with a dedicated bleed port.When airis bled through the flow sensor, the differential pressure signal from the sensor is affected. As aresult, the flow sensor signal can be radically altered if the volume regulator is bleeding air, andmay cause excessive damper movement.

Calibration—The minimum and maximum settings are independent of each other and need to beset only once during calibration.

Signal Configuration Flexibility—Both can be configured to work with both normally-open andnormally-closed pneumatic air valves, and both direct-acting and reverse-acting thermostats.

Pneumatic Volume Regulators

Flow Measurement and Control

The differential pressure signal output of the flow ring provides the terminal unit controller ameasurement of the primary airflow through the inlet.The terminal unit controller then opens orcloses the inlet damper to maintain the controller airflow setpoint

Flow Measurement

Most VAV terminal units contain a differential pressure airflow measurement device, mounted atthe primary air inlet, to provide a signal to the terminal unit controller. Numerous names exist forthe differential pressure measurement device—flow sensor, flow bar, flow ring.The differentialpressure measured at the inlet varies according to the volumetric flow rate of primary air enteringthe inlet.

The total pressure and the static pressure are measurable quantities.The flow measurementdevice in aVAV terminal unit is designed to measure velocity pressure. Most flow sensors consistof a hollow piece of tubing with orifices in it.TheVariTrane air valve contains a flow ring as its flow

One of the most important characteristics of aVAV terminal unit isits ability to accurately sense and control airflow.The VariTraneterminal unit was developed with exactly that goal in mind.Thepatented, multiple-point, averaging flow ring measures thevelocity of the air at the unit primary air inlet.

134 VAV-PRC011-EN


measuring device.The flow ring is two round coils of tubing. Evenly spaced orifices in the upstreamcoil are the high-pressure taps that average the total pressure of air flowing through the air valve.The orifices in the downstream ring are low-pressure taps that average the air pressure in the wakeof flow around the tube. By definition, the measurement of static pressure is to occur at a pointperpendicular to the airflow.The low-pressure taps on theVariTrane flow ring measure a pressurethat is parallel to the direction of flow but in the opposite direction of the flow.This“wake pressure”that the downstream ring measures is lower than the actual duct static pressure.The differencebetween the “wake pressure” and the static pressure can be accounted for so that the aboverelationship between flow and differential pressure remain valid.The difference also helps createa larger pressure differential than the velocity pressure. Since the pressures being measured inVAVterminal box applications are small, this larger differential allows transducers and controllers tomeasure and control at lower flow settings than would otherwise be possible.

The average velocity of air traveling through the inlet is expressed in the equation:

Where:

Often, the density is assumed to be a constant for dry air at standard conditions (68°F (20°C)) andsea level pressure of 14.7 psi (101.4 kPa)).These conditions yield the following commonly usedequation:

The velocity pressure is defined as the difference between the total pressure in the duct and thestatic pressure in the duct:

VP =TP - SP (All units are expressed in inches of water)

The amount of air traveling through the inlet is related to the area of the inlet and the velocity ofthe air:

AIRFLOW = AREA (square feet) x AVERAGE VELOCITY (feet per minute)

Accuracy

The multiple, evenly spaced orifices in the flow ring of the VariTrane terminal unit provide qualitymeasurement accuracy even if ductwork turns or variations are present before the unit inlet. Forthe most accurate readings, a minimum of 1½ diameters, and preferably 3 diameters, of straight-run ductwork is recommended prior to the inlet connection.The straight-run ductwork should beof the same diameter as the air valve inlet connection. If these recommendations are followed, andthe air density effects mentioned below are addressed, the flow ring will measure primary airflowwithin ±5% of unit nominal airflow.

FPM = Velocity of air in feet per minute

1096.5 = A constant

VP = The velocity pressure of the air expressed in inches of water

DENS = The density of the air expressed in pounds per cubic foot

FPM 1096.5 VPDENS------------------=

FPM 4005 VP=

Figure 14. Air pressure measurement orientations

VAV-PRC011-EN 135


Air Density Effects

Changes in air density due to the conditions listed below sometimes create situations where thestandard flow sensing calibration parameters must be modified.These factors must be accountedfor to achieve accuracy with the flow sensing ring. Designers, installers, and air balancers shouldbe aware of these factors and know of the necessary adjustments to correct for them.

Elevation

At high elevations the air is less dense.Therefore, when measuring the same differential pressureat elevation versus sea level the actual flow will be greater at elevation than it would be at sea level.To calculate the density at an elevation other than standard conditions (most manufacturers choosesea level as the point for their standard conditions), you must set up a ratio between the densityand differential pressure at standard conditions and the density and differential pressure at the newelevation.

Since the data from the manufacturer is published at standard conditions, this equation should besolved for the differential pressure at standard conditions and the other quantities substituted todetermine the ratio for the differential pressure measured at the new conditions.

Duct Pressure and AirTemperature Variations

While changes in these factors certainly affect the density of air, most operating parameters whichVAV systems need keep these effects very small.The impact on accuracy due to these changes isless than one half of one percent except in very extreme conditions (extreme conditions are definedas those systems with static pressures greater than 5 in. wg (1245 Pa) and primary air temperaturesgreater than 100°F (37.8°C)). Since those types of systems occur so infrequently, we assume theeffects of duct pressure and air temperature variations to be negligible.

Linearity

With the increase in DDC controls over pneumatic controls, the issue of linearity is not as great asit once was.The important aspect of flow measurement versus valve position is the accuracy ofthe controller in determining and controlling the flow. Our units are tested for linearity and thatposition versus airflow curve is downloaded and commissioned in the factory to insure propercontrol of the unit.

Reheat Options

PS dardConditionsDENSS dardConditions----------------------------------------------------------------------------------- PNewConditions

DENSNewConditions-------------------------------------------------------------------=

Figure 15. Hot water coil (L) & hot water valves (R)

136 VAV-PRC011-EN


Hot water heating coils are generally applied on VAV terminal units as reheat devices. Whenapplying these coils it is important to make sure that they are operating in the proper air flow andwater flow range. Either a two-way or a three-way valve controls the coils.

The most important factor when sizing valves is the coefficient of velocity or Cv.The Cv is definedas the flow rate, in gallons of 60°F (15.56°C) water, that will pass through the valve in one minutewith a one pound pressure drop.The coefficient of velocity, which is commonly called the flowcoefficient, is an industry standard rating. Valves having the same flow coefficient rating,regardless of manufacturer, will have the same waterside performance characteristics.

The equation that governs valve sizing is:

Where

Cv=Flow coefficient

GPM=The maximum water flow rate through the valve in gallons per minute

P=The maximum allowable differential pressure across the valve in psi

The flow and differential pressure are generally the known quantities.The equation is solved forthe flow coefficient.The flow coefficient is then compared to the published CV values for the controlvalves that are available.The control valve with the CV that is the closest, but greater than, thecalculated flow coefficient is the correct choice for the control valve.This choice will keep the valvepressure drop below the maximum allowable valve pressure drop.The valve pressure drop shouldthen be checked against the coil pressure drop. If the coil pressure drop is appreciably larger thanthe valve pressure drop, a valve with a smaller CV should be selected to produce a larger controlvalve pressure drop. If this new valve has a pressure drop that is much larger than the maximumallowable pressure drop for valves, the system designer should be consulted to make sure that thesystem hot water pumps can deliver the water at the new conditions.

Electric Reheat

Electric heating coils are applied onVAV terminal units as terminal reheat devices. Electric heat coilcapacity is rated in kilowatts (kW). Coils are available with the total capacity divided into one, two,or three stages.

Electric heat coils are available in single-phase or three-phase models.This refers to the type ofpower source connected to the coil. Single-phase models have resistance elements internallyconnected in parallel.Three- phase models have resistance elements internally connected in adelta or a wye configuration.

The current draw for the electric coil will depend upon whether it is a single-phase coil or a three-phase coil.The current draw is necessary for determining what size wire should be used to powerthe electric coils and how big the primary power fusing should be.

The equations for current draw for these coils are:

VariTrane three-phase electric heat is available in balanced configurations. For example, a 9 kWthree-phase coil, each stage would carry 1/3 or 3 kW of the load.

It is important to note that these coils have certain minimum airflow rates for each amount of kWheat the coil can supply to operate safely.These airflow values are based upon a maximum riseacross the electric heat coil of 50°F (28°C).

CvGPMP

--------------=

1amps kW 1000PrimaryVoltage--------------------------------------------------=

3amps kW 1000PrimaryVoltage 3-----------------------------------------------------------=

VAV-PRC011-EN 137


The equation that relates the airflow across an electric coil to the temperature rise and the coilchange in temperature is:

Where

CFM=Minimum airflow rate across the coil

kW=The heating capacity of the electric coil

3145=A constant

P=The maximum rise in air temperature across the coil (usually 50 degrees F (28 degrees C))

Electric heat coils are available with magnetic or mercury contactors. Magnetic contactors are lessexpensive than mercury contactors. However, mercury contactors can be cycled at a more rapidrate without failing. Mercury contactors are rated for heavier duty use and should be used in asmany applications as possible. For pneumatic applications the electric coils are available withfactory-installed pressure-electric switches.

Insulation

Matte-Faced

This type of insulation is used for typical applications. It consists of a fiberglass core covered bya high-density skin.The dual-density construction provides good sound attenuation and thermalperformance.

Foil-Faced

This type of insulation is used in applications where there is some concern regarding airbornecontaminants entering the space, or dirt being trapped in the fibers of the insulation.The insulationis composed of a fiberglass core laminated to a foil sheet. Foil-faced insulation will provide thesame sound attenuation performance as matte-faced insulation.

Double-Wall

This type of insulation is used in applications where there is extreme concern regarding airbornecontaminants entering the space or dirt being trapped in the fibers of the insulation. The insulationis the same as the matte-faced insulation. However, after the insulation is installed, a second solidwall of 26-gage steel covers the insulation. All wire penetrations of this insulation are covered bya grommet.This type of insulation will result in higher discharge and radiated sound power.

CFM kW 3145T

-------------------------------=

Encapsulated edges

Insulation in aVAV terminal unit is used to avoid condensationon the outside of the unit, to reduce the heat transfer from thecold primary air entering the unit, and to reduce the unit noise.TheVariTrane line offers four types of unit insulation.The typeof facing classifies the types of insulation.To enhance IAQeffectiveness, edges of all insulation types have metalencapsulated edges.

138 VAV-PRC011-EN


Closed-Cell

This type of insulation is used in applications where IAQ and fibers are of primary concern.Theacoustics of the closed-cell insulation are similar to double-wall insulation.The thermal propertiesare similar to fiberglass insulation.This insulation contains no fiberglass.

Acoustics

Acoustical Best Practices

Acoustics with terminal units is sometimes more confusing than it needs to be. As we know, lowervelocities within a unit leads to improved acoustical performance. Additionally, if theVAV terminalunit has a fan, a lower RPM provides better Acoustical performance. It is as simple as that—thereare some catches, however.

Additional considerations will be discussed in more detail throughout this portion of ApplicationConsiderations, such as unit size and type, appurtenance affects (due to insulation, attenuation,etc.), certification, and computer modeling. Let’s take a look at the first consideration, sizing ofunits.

Sizing of Units

Before blindly increasing the size of units, we must first understand what is setting the acousticswithin the space. In general, over 95% of acoustics in VAV terminal units, which set the soundpressure levels and ultimately the NC within the space, is from radiated sound. This is readilyknown for fan-powered units, but less commonly known for single- and dual-duct units. Radiatedsound emanates from the unit and enters the occupied space via means other than through thesupply ductwork. The most typical path is through the plenum space, then through the ceiling, theninto the occupied space. While discharge sound should never be ignored, radiated sound is themost dominant and usually the most critical sound source.

When increasing air valve sizes, BE CAREFUL. Oversizing an air valve can adversely impactthe ability to modulate and properly control temperature in the space. In extremelyoversized situations, the air valve will operate like a two-position controlled device, with air eitherbeing “on”, or “off”, and not really much in between.The best way to avoid this is to understand thatthe minimum for most air valves is 300 FPM.This is a function of the flow sensing device and theability of the pressure transducer and controller to properly read and report flow.This is notmanufacturer specific, as physics applies to all.Therefore, when sizing air valves, regardless of themax cooling velocity the minimum velocity for proper pressure independent flow is 300 FPM.

Modulation capability and range is vital for proper operation ofVAV systems. With oversized units,the unit will act as a constant volume system eliminating the energy savings and individual zonecontrol advantages ofVAV systems. A good rule of thumb is to size cooling airflow for around 2000FPM. VAV systems only operate at full flow when there is a maximum call for cooling in the zone.The greatest portion of the time, an air valve will be operating at partial flows.

When sizing fan-powered units, the fan airflow range can be determined by looking at the fan-curve. Because parallel and series fan-powered units operate at a constant fan flow, selections canbe made all the way to the lowest flow ranges of the fan curve. A good balance of performance andcost is to select fans at 70-80% of maximum fan flow.

Insulation types

Insulation is a factor to consider when dealing with the acoustics of terminal units. Most insulationtypes will provide similar acoustical results, but there are exceptions. Double-wall and closed-cellfoam insulation will generally increase your sound levels because of the increased reflectivesurface area that the solid inner-wall and closed-cell construction provides.This increase in soundwill have to be balanced with the IAQ and cleanability considerations of the dual-wall and closed-cell construction.

VAV-PRC011-EN 139


Placement of units

Unit placement in a building can have a significant impact on the acceptable sound levels. Locatingunits above non-critical spaces (hallways, closets, and storerooms) will help to contain radiatedsound from entering the critical occupied zones.

Unit Attenuation

Terminal unit-installed attenuators are an option available to provide path sound attenuation.Manufacturer-provided attenuators on the discharge of a terminal unit are targeted at reducingdischarge path noise and are typically a simple lined piece of ductwork. It would often be easier andless expensive to design the downstream ductwork to be slightly longer and require the installingcontractor to include lining in it. Attenuators on the plenum inlet of fan-powered terminals aretargeted at reducing radiated path noise since the plenum opening on a fan-powered terminal unitis typically the critical path sound source. Significant reduction in radiated path noise can resultfrom a well-designed inlet attenuator.The attenuation from these attenuators is due to simpleabsorption from the attenuator lining and occupant line of sight sound path obstruction.Therefore,longer attenuators and attenuators that require the sound to turn multiple corners before reachingthe occupied space provide superior results, particularly in the lower frequency bands.

Attenuators that are simple “cups” at the plenum inlet(s) have been shown inTrane’s acousticalmock-up to provide no measurable reduction in sound pressure in the critical octave bands whichset the occupied space noise criteria.

Certification andTesting

Terminal units should be submitted based on the same criteria.There are several ways to ensurethis by certification and testing.

Raw unit sound data can be good measurement criteria for evaluation. In using this as a basis forcomparison, the designer needs to make sure that the information is based on the AHRI Standard880-2011 that gives the procedure for testing.

Specifying NC or RC sound levels is a possible comparison, but the designer needs to be sure thecomparison is fair.Two options are to specify the attenuation effect on which you would like theunits to be evaluated or to specify that AHRI Standard 885-2008 transfer functions be used.Theimportance of AHRI Standard 885-2008 is that it is the first AHRI Standard that specifies exacttransfer functions to be used for evaluation. Previous versions of the standard gave guidelines, butthe manufacturers could choose their own set of factors.

Table 50. Octave band frequencies

Octave Band Center Frequency Band Edge Frequencies

1234

63125250500

44.6-88.588.5-177177-354354-707

5678

1000200040008000

707-14141414-28302830-56505650-11300

140 VAV-PRC011-EN


By using NC sound levels, it is possible to express acceptable sound levels for various types ofbuildings or environments. A few examples are:

Path Attenuation

Sound is generated by a terminal unit can reach the occupied space along several paths.Theterminal unit generated sound will lose energy—i.e., the energy is absorbed by path obstacles—as it travels to the occupied space.This acoustical energy dissipation as it travels to the occupiedspace is called path attenuation.The amount of energy lost along a particular path can bequantified and predicted using the procedure outlined in AHRI-885. Each path must be consideredwhen determining acceptable sound power generated by a terminal unit.

The term “transfer function” is often used to describe the entire path attenuation value for eachoctave band (i.e., the sum of all components of a particular path).

Examples of path attenuation include locating the terminal unit away from the occupied space,increasing the STC (sound transmission classification) of the ceiling tile used, internally liningductwork, drywall lagging the ceiling tiles or enclosing the terminal unit in drywall. All of thesechoices have costs associated with them that must be weighed against the benefits. Some of thesealternatives can be acoustically evaluated from application data provided inAHRI-885. Others mayrequire professional analysis from an acoustical consultant.

Computer Modeling

Computer modeling of acoustical paths is available to help estimate sound levels and determineproblem sources.The software used byTrane for computer modeling is calledTrane AcousticsProgram (TAP™).

Concert Hall NC-22

Hospital Room NC-30

School Room NC-35

General Office NC-40

Cafeteria NC-45

Factory NC-65

VAV-PRC011-EN 141


TAP can analyze different room configurations and materials to quickly determine the estimatedtotal sound levels (radiated and discharged) in a space.TheTrane Official Product Selection System(TOPSS™) can also be used to determine sound levels of terminal units.You can base selectionson a maximum sound level and enter your own attenuation factors (defaults based on AHRI-885are also available).

Other Resources

Refer to "Additional References" at the end of this chapter to see a list of publications to help withthe basics of acoustical theory and modeling.You can also contact your localTrane salespersonto discuss the issue.

Duct Design

Designing cost-effective VAV duct systems is challenging. Some duct design methods result inbetter pressure balance than others do. Duct shape and duct material can influence duct systemdesign and cost. In addition, duct layout is properly designed for optimal duct installation andoperation.

Duct Design Program

Trane has developed a computer program, VariTrane™ Duct Designer, to aid in the duct designprocess.This program is used to calculate duct sizes, fitting sizes, terminal unit sizes, and pressuredrops according to the equal friction or static regain method.The duct design program can beeasily incorporated into the selection ofVAV terminal units.The inputs and outputs for the programenableVariTrane units to be selected based on the conditions you require.This makes selecting andscheduling units much easier. Contact the local sales office or theTrane C.D.S.™ department formore details on this program.

Design Methods

The two most widely used supply duct design methods—equal friction and static regain—arediscussed below.

Equal Friction – Using this method, ducts are sized at design flow to have roughly the same staticpressure drop for every 100 feet of duct. Static pressures throughout the duct system can bebalanced at design flow using balancing dampers, but are no longer balanced at part load flows.For this reason, equal friction duct designs are better suited for constant volume systems than forVAV systems. If the equal friction method is used for theVAV supply duct design, the terminal unitsusually require pressure-independent (PI) control capability to avoid excessive flow rates whenduct pressures are high.

In VAV systems, the ducts located downstream of the terminal unit are usually sized for equalfriction.The advantage of this design method is its simplicity. Often, calculations can be madeusing simple tables and duct calculators. Drawbacks include increased higher total pressure dropsand higher operating costs.

Static Regain – In the static regain method, ducts are sized to maintain constant static pressurein each section, which is achieved by balancing the total and velocity pressure drops of eachsection. In other words, static pressure is “regained” by the loss of velocity pressure. Since thestatic pressures throughout the duct system are roughly balanced at design and part load flow,static regain duct designs can be used successfully for either constant volume or VAV systems.When the static regain method is used for VAV systems, the system is roughly pressure balancedat design.

Advantages of the static regain method include reduced total pressure drops, lower operatingcosts, and balanced pressures over a wide range of flows.The drawback of this design is the time-consuming, iterative calculation procedure and for large systems, it is essential to have a ductdesign computer program.

142 VAV-PRC011-EN


Best Practices

Common Mistakes

Some of the most common system or installation errors are discussed below.

Reducers at Unit Inlet

This problem is a very common issue that is seen in applications of VariTrane products. It is oftenmistaken by those in the field as an unacceptably large static pressure drop through the unit. It isalso sometimes mistaken as a malfunctioning flow ring, pressure transducer (if DDC or analogelectronic controls are present) or PVR (if pneumatic controls are present).

This problem is sometimes unknowingly encountered because of the capability of the VariTraneunit to allow greater airflow for a specific size duct than other terminal units. For example, a projectengineer specifies an 8" (203 mm) round take off from the main duct trunk to theVAV terminal unit.The person supplying the VAV terminal unit checks the required airflow and finds that a VariTraneunit with a 6" (152 mm) inlet will provide the specified terminal unit performance.The terminal unitsupplier submits, receives approval, and orders the 6" (152 mm) inlet unit.While this is happening,the installing contractor has run the connecting duct from the main trunk to the terminal unit in thespecified 8" (152 mm) round.The unit arrives at the job site, and the installer notices that the 8" (203mm) duct and the 6" (152 mm) terminal unit inlet do not match.To get the unit installed, an 8- to6-inch reducer is placed at the inlet to the terminal unit air valve.

The reducer will cause a phenomenon called flow separation at the unit inlet. Fluid dynamicsanalysis can present a detailed technical explanation of flow separation, but the characteristicsimportant to this discussion are the production of pressure loss and turbulence. The reducer willhave a significant static pressure drop associated with it since the air velocity is increased (i.e.,static pressure is given up for increased velocity pressure). The pressure loss is sometimesmistaken as a loss due to the function of the terminal unit.The turbulence is at its greatest justdownstream of the reducer. Unfortunately, this is the location of the flow ring at the air-valve inlet.The reducer will cause the flow ring to give an inaccurate and inconsistent reading because of theturbulent air.

The solutions to this situation are:

• Locate the reducer upstream of the terminal unit at least three duct diameters to eliminate flowseparation and turbulence at the unit inlet and to improve the airflow measurement accuracy.

• Consider proper sizing of the terminal unit in the duct design and account for the pressure lossof the reducer in the central fan selection if a reducer is required. Be cautious of “oversizing”a VAV terminal. It is good practice to make sure that the inlet duct velocity at the minimumairflow setting is no lower than 500 feet per minute.

Improper Use of Flexible Ductwork

While flexible ductwork has many benefits, improper use can cause numerous problems in aVAVsystem. Flexible ductwork causes turbulent airflow and relatively large static pressure drops.Flexible ductwork at a primary damper inlet (i.e., the flow sensor location) may cause flow accuracyand repeatability problems due to turbulence.The use of flexible ductwork should be primarilylimited to the downstream side of the terminal units in a VAV system. Use of flexible ductworkupstream of terminal units should be kept to an absolute minimum. All runs of flexible ductworkshould be kept as short as possible. While most know these guidelines, the ease of installationwhich flexible ductwork provides is always an enticement to push the limits of what are acceptablepractices.

Static Pressure Measurement Errors

Improper measurement techniques for static pressure can lead many to mistakenly believe that theterminal unit is causing a large pressure drop in the system.The chief error made here is taking astatic pressure measurement in turbulent locations such as flexible ductwork or near transitions.

VAV-PRC011-EN 143


This produces invalid static pressure readings. Another error commonly made is trying to read thestatic pressure at the same point as the flow sensing device.The inlets to VAV terminal unitsproduce turbulence and will give poor readings. Flow sensors with their multiple-point averagingcapability are best equipped to deal with this type of flow, while a single-point static probe is not.Another common error is the incorrect orientation of the static pressure probe.The static pressureis correctly measured when the probe is oriented perpendicular to the direction of airflow.Theprobe, or a part of it, should never be facing the direction of airflow, because the total pressure willinfluence the reading of the probe.

Unit Conversions

Additional VAV System and Product References

VAV Systems Air Conditioning Clinic

This clinic is designed to explain the system components, the system configurations, many of theVAV system options and applications. A great resource for VAV system understanding.

Literature Order Number:TRG-TRC014-EN

Indoor Air Quality – A guide to understanding ASHRAE Standard 62-2001

The guide helps to explain the ASHRAE Standard as well as the fundamentals of good indoor airquality. A great resource for understanding the standard and ways of designing VAV systemsaround that standard.

Literature Order Number: ISS-APG001-EN

Table 51. Conversions of length and area

To convert From To Multiply by

LengthLengthLengthLength

In.Ftmm

mmIn.Ft

0.02540.304839.37013.28084

AreaAreaAreaArea

In.2Ft2m2

m2

m2

m2

In.2Ft2

0.000645160.092903

155010.7639

Table 52. Conversions of velocity, pressure, and flow rate

To convert From To Multiply by

VelocityVelocity

Ft/minM/s

M/sFt/min

0.00508196.850

PressurePressurePressurePressurePressurePressure

PsiFt of waterIn. of water

PaPaPa

PaPaPaPsi

Ft of waterIn. of water

6894.762988.98249.082

0.0001450380.0003345620.00401474

Flow RateFlow RateFlow RateFlow RateFlow RateFlow Rate

CfmCfmGpmm3/sL/sL/s

L/sm3/sL/sCfmCfmGpm

0.47190.0004719470.06309022118.882.119115.8503

144 VAV-PRC011-EN


Managing Outdoor Air –Traq™ Comfort Systems

This brochure is a good, quick reference of the issues of managing outdoor air for a VAV system.

Literature Order Number: CLCH-S-26

Ventilation and Fan Pressure Optimization for VAV Systems

An engineering bulletin designed to how aTrane Integrate Comfort™ system can effectivelycontrol building ventilation and supply fan pressure for increased comfort and IAQ while keepingenergy costs to the lowest possible.

Literature Order Number: SYS-EB-2

Trane DDC/VAV Systems Applications Engineering Manual

This manual gives detailed descriptions of theTrane DDC/VAV system.Topics include systemcomponents, how the system interacts and specific inputs and outputs of the system.

Literature Order Number: ICS-AM-6

Acoustics in Air Conditioning Applications Engineering Manual

This manual describes the basic fundamentals, behavior, measurement, and control of sound, alldirected at the design of quiet systems.

Literature Order Number: FND-AM-5

VariTrac™ catalog

The catalog will help explain features and benefits of VariTrac, how the VariTrac product works,applications for the product, and selection procedures.

Literature Order Number: VAV-PRC003-EN

ASHRAE Handbook of Fundamentals

ASHRAE Handbook of HVAC Systems and Equipment

ASHRAE Handbook of HVAC Applications

ASHRAE Handbook of Refrigeration

Web sites:

• www.ashrae.org

• www.ahrinet.org

• www.trane.com

VAV-PRC011-EN 145

http://www.ashrae.org

http://www.ari.org

http://www.trane.com

Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, the leader increating and sustaining safe, comfortable and energy efficient environments,Trane offers a broad portfolio of advancedcontrols and HVAC systems, comprehensive building services, and parts. For more information, visit www.Trane.com.

Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.

We are committed to using environmentally

conscious print practices that reduce waste.

© 2013Trane All rights reserved

VAV-PRC011-EN 16 July 2013

Supersedes VAV-PRC011-EN (27 Jun 2013)

Documents

VAV-PRC011-EN_07162013